Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Debbie Scott-Bowker
Table title:
Achievements
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Competition </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Position </th><th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <th colspan=6 rowspan=1 > Representing Canada </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 1978 </td><td class="highlighted"  colspan=1 rowspan=2 > Commonwealth Games </td><td colspan=1 rowspan=2 > Edmonton, Alberta, Canada </td><td colspan=1 rowspan=1 > 17th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:24.36 </td></tr>
<tr> <td colspan=1 rowspan=1 > 9th </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 10:02.59 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1979 </td><td colspan=1 rowspan=1 > World Cross Country Championships </td><td colspan=1 rowspan=1 > Limerick, Ireland </td><td colspan=1 rowspan=1 > 13th </td><td colspan=1 rowspan=1 > 5.0 km </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > World Cross Country Championships </td><td colspan=1 rowspan=1 > Madrid, Spain </td><td colspan=1 rowspan=1 > 8th </td><td colspan=1 rowspan=1 > 4.4 km </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 1982 </td><td class="highlighted"  colspan=1 rowspan=2 > Commonwealth Games </td><td colspan=1 rowspan=2 > Brisbane, Australia </td><td colspan=1 rowspan=1 > 11th (h) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:18.90 </td></tr>
<tr> <td colspan=1 rowspan=1 > 12th </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 9:32.20 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > World Cross Country Championships </td><td colspan=1 rowspan=1 > New York City, United States </td><td colspan=1 rowspan=1 > 64th </td><td colspan=1 rowspan=1 > 5.0 km </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1984 </td><td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Los Angeles, United States </td><td colspan=1 rowspan=1 > 10th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:10.41 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1985 </td><td colspan=1 rowspan=1 > World Indoor Games </td><td colspan=1 rowspan=1 > Paris, France </td><td colspan=1 rowspan=1 > 1st </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 9:04.99 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1985 </td><td colspan=1 rowspan=1 > World Cross Country Championships </td><td colspan=1 rowspan=1 > Lisbon, Portugal </td><td colspan=1 rowspan=1 > 11th </td><td colspan=1 rowspan=1 > 5.0 km </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 1986 </td><td colspan=1 rowspan=1 > World Cross Country Championships </td><td colspan=1 rowspan=1 > Neuchâtel, Switzerland </td><td colspan=1 rowspan=1 > 64th </td><td colspan=1 rowspan=1 > 4.7 km </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 1986 </td><td class="highlighted"  colspan=1 rowspan=2 > Commonwealth Games </td><td colspan=1 rowspan=2 > Edinburgh, Scotland </td><td class="highlighted"  colspan=1 rowspan=1 > 2nd </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:11.94 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 2nd </td><td class="highlighted"  colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 8:54.83 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1987 </td><td class="highlighted"  colspan=1 rowspan=1 > Pan American Games </td><td colspan=1 rowspan=1 > Indianapolis, United States </td><td class="highlighted"  colspan=1 rowspan=1 > 2nd </td><td class="highlighted"  colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=2 > 1987 </td><td colspan=1 rowspan=2 > World Championships </td><td colspan=1 rowspan=2 > Rome, Italy </td><td colspan=1 rowspan=1 > 11th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:08.38 </td></tr>
<tr> <td colspan=1 rowspan=1 > 13th </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 8:58.63 </td></tr>
<tr> <td colspan=1 rowspan=2 > 1988 </td><td colspan=1 rowspan=2 > Olympic Games </td><td colspan=1 rowspan=2 > Seoul, South Korea </td><td colspan=1 rowspan=1 > 12th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:17.95 </td></tr>
<tr> <td colspan=1 rowspan=1 > 15th </td><td colspan=1 rowspan=1 > 3000 m </td><td colspan=1 rowspan=1 > 9:11.95 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 1990 </td><td class="highlighted"  colspan=1 rowspan=1 > Commonwealth Games </td><td colspan=1 rowspan=1 > Auckland, New Zealand </td><td colspan=1 rowspan=1 > 6th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:11.20 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > World Championships </td><td colspan=1 rowspan=1 > Tokyo, Japan </td><td colspan=1 rowspan=1 > 11th </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:06.06 </td></tr>
<tr> <td colspan=1 rowspan=1 > 1992 </td><td colspan=1 rowspan=1 > Olympic Games </td><td colspan=1 rowspan=1 > Barcelona, Spain </td><td colspan=1 rowspan=1 > 22nd (sf) </td><td colspan=1 rowspan=1 > 1500 m </td><td colspan=1 rowspan=1 > 4:12.50 </td></tr>
<tr> <th colspan=6 rowspan=1 > (#) Indicates overall position in qualifying heats (h) or semifinals (sf) </th></tr>
</table>
Question:
How did Scott-Bowker perform at the 1986 and 1987 commonwealth games in the 1500 and 3000m?
Answer:
Scott-Bowker competed at four Commonwealth Games (1978–90), winning silver medals at the 1986 Commonwealth Games in the 1500 m and 3000 m, and another silver in the 1500 m at the 1987 Pan American Games.