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:
Renaissance Center
Table title:
Technical details and tenants
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Building </th><th colspan=1 rowspan=1 > Image </th><th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Stories </th><th colspan=1 rowspan=1 > Height feet / m </th><th colspan=1 rowspan=1 > Area sq feet / m² </th><th colspan=1 rowspan=1 > Principal tenant(s) </th></tr>
<tr> <td colspan=1 rowspan=1 > Detroit Marriott at the Renaissance Center. (Central hotel tower) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > 73 </td><td colspan=1 rowspan=1 > 727 / 221.5 </td><td colspan=1 rowspan=1 > 1,812,000 / 168,300 estimate </td><td colspan=1 rowspan=1 > Marriott hotel. Coach Insignia restaurant located at the top closed in 2017. </td></tr>
<tr> <td colspan=1 rowspan=1 > Southwest – Tower 100 </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > 39 </td><td colspan=1 rowspan=1 > 522 / 159 </td><td colspan=1 rowspan=1 > 550,000 / 51,100 </td><td colspan=1 rowspan=1 > General Motors HP Enterprise Services United States Post Office </td></tr>
<tr> <td colspan=1 rowspan=1 > Northwest – Tower 200 </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > 39 </td><td colspan=1 rowspan=1 > 522 / 159 </td><td colspan=1 rowspan=1 > 550,000 / 51,100 </td><td colspan=1 rowspan=1 > Ally Financial Headquarters Deloitte </td></tr>
<tr> <td colspan=1 rowspan=1 > Northeast – Tower 300 </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > 39 </td><td colspan=1 rowspan=1 > 522 / 159 </td><td colspan=1 rowspan=1 > 550,000 / 51,100 </td><td colspan=1 rowspan=1 > General Motors The Renaissance Conference Center on level 2 contains 20,000 sq ft (1,900 m2). of meeting space. </td></tr>
<tr> <td colspan=1 rowspan=1 > Southeast – Tower 400 </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > 39 </td><td colspan=1 rowspan=1 > 522 / 159 </td><td colspan=1 rowspan=1 > 550,000 / 51,100 </td><td colspan=1 rowspan=1 > General Motors OnStar CBRE Consulate-General of Japan, Detroit. </td></tr>
<tr> <td colspan=1 rowspan=1 > Podium structures beneath Towers 100–400 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 103 / 31.39 </td><td colspan=1 rowspan=1 > 660,000 / 61,300 </td><td colspan=1 rowspan=1 > GM Showroom Food Court Exhibit space & retail </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Tower 500 </td><td colspan=1 rowspan=2 >  </td><td class="highlighted"  colspan=1 rowspan=1 > 1981 2004 </td><td class="highlighted"  colspan=1 rowspan=1 > 21 </td><td class="highlighted"  colspan=1 rowspan=1 > 339 / 103 </td><td colspan=1 rowspan=1 > 320,000 / 29,700 </td><td colspan=1 rowspan=1 > Blue Cross Blue Shield of Michigan. Includes 14,845 sq ft (1,380 m2) of retail space. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > Tower 600 </td><td class="highlighted"  colspan=1 rowspan=1 > 1981 2004 </td><td class="highlighted"  colspan=1 rowspan=1 > 21 </td><td class="highlighted"  colspan=1 rowspan=1 > 339 / 103 </td><td colspan=1 rowspan=1 > 340,000 / 31,600 </td><td colspan=1 rowspan=1 > Blue Cross Blue Shield of Michigan and Consulate-General of Canada. Includes 35,730 sq ft (3,320 m2) of retail space. </td></tr>
<tr> <td colspan=1 rowspan=1 > Wintergarden & Restaurants </td><td colspan=1 rowspan=2 > - </td><td colspan=1 rowspan=1 > 2001 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 103 / 31.39 </td><td colspan=1 rowspan=1 > 150,000 / 14,000 </td><td colspan=1 rowspan=1 > Andiamo Presto </td></tr>
<tr> <td colspan=1 rowspan=1 > Wintergarden atrium </td><td colspan=1 rowspan=1 > 2001 </td><td colspan=1 rowspan=1 > 5 </td><td colspan=1 rowspan=1 > 103 / 31.39 </td><td colspan=1 rowspan=1 > 40,000 / 3,700 </td><td colspan=1 rowspan=1 > Main entry and exhibit space. </td></tr>
<tr> <td colspan=1 rowspan=1 > Renaissance Center total </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 1977 2004 </td><td colspan=1 rowspan=1 > NA </td><td colspan=1 rowspan=1 > 727 / 221.5 </td><td colspan=1 rowspan=1 > 5,552,000 / 515,800 </td><td colspan=1 rowspan=1 > Owner of complex: General Motors. Property management firm: CBRE. </td></tr>
</table>
Question:
Which Renaissance Center towers were first constructed in the 1980's, and what were their final heights?
Answer:
Two 21-story towers (Tower 500 and Tower 600), constructed in 1981, reached 339 feet (103 m).