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:
2017 NASCAR K&N Pro Series East
Table title:
Schedule
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > No. </th><th colspan=1 rowspan=1 > Race Title </th><th colspan=1 rowspan=1 > Track </th><th colspan=1 rowspan=1 > Date </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td class="highlighted"  colspan=1 rowspan=1 > Jet Tools 150 </td><td class="highlighted"  colspan=1 rowspan=1 > New Smyrna Speedway, New Smyrna Beach </td><td class="highlighted"  colspan=1 rowspan=1 > February 19 </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td colspan=1 rowspan=1 > Kevin Whitaker Chevrolet 150 </td><td colspan=1 rowspan=1 > Greenville-Pickens Speedway, Greenville </td><td colspan=1 rowspan=1 > April 8 </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > Zombie Auto 125 </td><td colspan=1 rowspan=1 > Bristol Motor Speedway, Bristol </td><td colspan=1 rowspan=1 > April 22 </td></tr>
<tr> <th colspan=1 rowspan=1 > 4 </th><td colspan=1 rowspan=2 > WhosYourDriver.org Twin 100s </td><td colspan=1 rowspan=2 > South Boston Speedway, South Boston </td><td colspan=1 rowspan=2 > May 6 </td></tr>
<tr> <th colspan=1 rowspan=1 > 5 </th></tr>
<tr> <th colspan=1 rowspan=1 > 6 </th><td colspan=1 rowspan=1 > Memphis 125 presented by AutoZone </td><td colspan=1 rowspan=1 > Memphis International Raceway, Millington </td><td colspan=1 rowspan=1 > June 3 </td></tr>
<tr> <th colspan=1 rowspan=1 > 7 </th><td colspan=1 rowspan=1 > Stars & Stripes 150 </td><td colspan=1 rowspan=1 > Berlin Raceway, Marne </td><td colspan=1 rowspan=1 > July 1 </td></tr>
<tr> <th colspan=1 rowspan=1 > 8 </th><td colspan=1 rowspan=1 > Busch North Throwback 100 </td><td colspan=1 rowspan=1 > Thompson Speedway Motorsports Park, Thompson </td><td colspan=1 rowspan=1 > July 8 </td></tr>
<tr> <th colspan=1 rowspan=1 > 9 </th><td colspan=1 rowspan=1 > United Site Services 70 </td><td colspan=1 rowspan=1 > New Hampshire Motor Speedway, Loudon </td><td colspan=1 rowspan=1 > July 15 </td></tr>
<tr> <th colspan=1 rowspan=1 > 10 </th><td colspan=1 rowspan=1 > Casey's General Stores 150 presented by Vatterott College </td><td colspan=1 rowspan=1 > Iowa Speedway, Newton </td><td colspan=1 rowspan=1 > July 28 </td></tr>
<tr> <th colspan=1 rowspan=1 > 11 </th><td colspan=1 rowspan=1 > Finger Lakes Wine Country 100 </td><td colspan=1 rowspan=1 > Watkins Glen International, Watkins Glen </td><td colspan=1 rowspan=1 > August 4 </td></tr>
<tr> <th colspan=1 rowspan=1 > 12 </th><td colspan=1 rowspan=1 > Visit Hampton Virginia 150 </td><td colspan=1 rowspan=1 > Langley Speedway, Hampton </td><td colspan=1 rowspan=1 > September 4 </td></tr>
<tr> <th colspan=1 rowspan=1 > 13 </th><td colspan=1 rowspan=1 > JustDrive.com 125 </td><td colspan=1 rowspan=1 > New Jersey Motorsports Park, Millville </td><td colspan=1 rowspan=1 > September 16 </td></tr>
<tr> <th colspan=1 rowspan=1 > 14 </th><td class="highlighted"  colspan=1 rowspan=1 > National Fallen Firefighters Foundation 125 presented by Carl Deputy & Son Builders </td><td class="highlighted"  colspan=1 rowspan=1 > Dover International Speedway, Dover </td><td class="highlighted"  colspan=1 rowspan=1 > September 29 </td></tr>
<tr> <th colspan=4 rowspan=1 > Source: </th></tr>
</table>
Question:
Which races opened and closed the 2017 NASCAR season?
Answer:
The 2017 NASCAR K&N Pro Series East began with the Jet Tools 150 at New Smyrna Speedway on February 19 and concluded with the National Fallen Firefighters Foundation 125 presented by Carl Deputy & Son Builders at Dover International Speedway on September 29.