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:
1977 NAPA National 500
Table title:
Qualifying
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Grid </th><th colspan=1 rowspan=1 > No. </th><th colspan=1 rowspan=1 > Driver </th><th colspan=1 rowspan=1 > Manufacturer </th><th colspan=1 rowspan=1 > Speed </th><th colspan=1 rowspan=1 > Qualifying time </th><th colspan=1 rowspan=1 > Owner </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td colspan=1 rowspan=1 > 21 </td><td class="highlighted"  colspan=1 rowspan=1 > David Pearson </td><td colspan=1 rowspan=1 > Mercury </td><td class="highlighted"  colspan=1 rowspan=1 > 160.982 </td><td colspan=1 rowspan=1 > 33.544 </td><td colspan=1 rowspan=1 > Wood Brothers </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td colspan=1 rowspan=1 > 11 </td><td colspan=1 rowspan=1 > Cale Yarborough </td><td colspan=1 rowspan=1 > Chevrolet </td><td colspan=1 rowspan=1 > 159.848 </td><td colspan=1 rowspan=1 > 33.782 </td><td colspan=1 rowspan=1 > Junior Johnson </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > 1 </td><td colspan=1 rowspan=1 > Donnie Allison </td><td colspan=1 rowspan=1 > Chevrolet </td><td colspan=1 rowspan=1 > 159.848 </td><td colspan=1 rowspan=1 > 33.782 </td><td colspan=1 rowspan=1 > Hoss Ellington </td></tr>
<tr> <th colspan=1 rowspan=1 > 4 </th><td colspan=1 rowspan=1 > 15 </td><td colspan=1 rowspan=1 > Buddy Baker </td><td colspan=1 rowspan=1 > Ford </td><td colspan=1 rowspan=1 > 159.773 </td><td colspan=1 rowspan=1 > 33.798 </td><td colspan=1 rowspan=1 > Bud Moore </td></tr>
<tr> <th colspan=1 rowspan=1 > 5 </th><td colspan=1 rowspan=1 > 43 </td><td colspan=1 rowspan=1 > Richard Petty </td><td colspan=1 rowspan=1 > Dodge </td><td colspan=1 rowspan=1 > 159.363 </td><td colspan=1 rowspan=1 > 33.885 </td><td colspan=1 rowspan=1 > Petty Enterprises </td></tr>
<tr> <th colspan=1 rowspan=1 > 6 </th><td colspan=1 rowspan=1 > 88 </td><td colspan=1 rowspan=1 > Darrell Waltrip </td><td colspan=1 rowspan=1 > Chevrolet </td><td colspan=1 rowspan=1 > 158.810 </td><td colspan=1 rowspan=1 > 34.003 </td><td colspan=1 rowspan=1 > DiGard Racing </td></tr>
<tr> <th colspan=1 rowspan=1 > 7 </th><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > Neil Bonnett </td><td colspan=1 rowspan=1 > Dodge </td><td colspan=1 rowspan=1 > 158.753 </td><td colspan=1 rowspan=1 > 34.015 </td><td colspan=1 rowspan=1 > Jim Stacy </td></tr>
<tr> <th colspan=1 rowspan=1 > 8 </th><td colspan=1 rowspan=1 > 72 </td><td colspan=1 rowspan=1 > Benny Parsons </td><td colspan=1 rowspan=1 > Chevrolet </td><td colspan=1 rowspan=1 > 158.735 </td><td colspan=1 rowspan=1 > 34.019 </td><td colspan=1 rowspan=1 > L.G. DeWitt </td></tr>
<tr> <th colspan=1 rowspan=1 > 9 </th><td colspan=1 rowspan=1 > 51 </td><td colspan=1 rowspan=1 > A.J. Foyt </td><td colspan=1 rowspan=1 > Chevrolet </td><td colspan=1 rowspan=1 > 158.158 </td><td colspan=1 rowspan=1 > 34.143 </td><td colspan=1 rowspan=1 > A.J. Foyt </td></tr>
<tr> <th colspan=1 rowspan=1 > 10 </th><td colspan=1 rowspan=1 > 92 </td><td colspan=1 rowspan=1 > Skip Manning </td><td colspan=1 rowspan=1 > Chevrolet </td><td colspan=1 rowspan=1 > 158.094 </td><td colspan=1 rowspan=1 > 34.157 </td><td colspan=1 rowspan=1 > Billy Hagan </td></tr>
</table>
Question:
How did David Pearson win the pole position?
Answer:
In the 1977 NAPA National 500, David Pearson won the pole position with a qualifying speed of 160.982 miles per hour.