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:
Jessica Mauboy videography
Table title:
Music videos
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Title </th><th colspan=1 rowspan=1 > Year </th><th colspan=1 rowspan=1 > Other performer(s) </th><th colspan=1 rowspan=1 > Director(s) </th><th colspan=1 rowspan=1 > Album </th><th colspan=1 rowspan=1 > Ref. </th></tr>
<tr> <th colspan=1 rowspan=1 > "Running Back" </th><td colspan=1 rowspan=2 > 2008 </td><td colspan=1 rowspan=1 > Flo Rida </td><td colspan=1 rowspan=1 > Fin Edquist </td><td colspan=1 rowspan=6 > Been Waiting </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Burn" </th><td colspan=1 rowspan=5 > N/A </td><td colspan=1 rowspan=2 > Keir McFarlane </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Been Waiting" </th><td class="highlighted"  colspan=1 rowspan=4 > 2009 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Because" </th><td colspan=1 rowspan=1 > Mike Corte David Murrell </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Up/Down" </th><td colspan=1 rowspan=1 > Sequoia </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > "Let Me Be Me" </th><td class="highlighted"  colspan=1 rowspan=1 > Mark Alston </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Everyone" </th><td colspan=1 rowspan=4 > 2010 </td><td colspan=1 rowspan=1 > Steve Appleton, Sean Kingston, Tabitha Nauser and Jody Williams </td><td colspan=1 rowspan=1 > Ken Lim </td><td colspan=1 rowspan=1 > N/A </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Get 'Em Girls" </th><td colspan=1 rowspan=1 > Snoop Dogg </td><td colspan=1 rowspan=3 > Hype Williams </td><td colspan=1 rowspan=6 > Get 'Em Girls </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Saturday Night" </th><td colspan=1 rowspan=1 > Ludacris </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Saturday Night" (without Ludacris) </th><td colspan=1 rowspan=1 > N/A </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > "What Happened to Us" </th><td colspan=1 rowspan=3 > 2011 </td><td colspan=1 rowspan=1 > Jay Sean </td><td class="highlighted"  colspan=1 rowspan=2 > Mark Alston </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > "Inescapable" </th><td colspan=1 rowspan=1 > N/A </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Galaxy" </th><td colspan=1 rowspan=1 > Stan Walker </td><td colspan=1 rowspan=1 > Melvin J. Montalban </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Who's Loving You" </th><td colspan=1 rowspan=3 > 2012 </td><td colspan=1 rowspan=13 > N/A </td><td colspan=1 rowspan=3 > Samuel Leighton-Dore </td><td colspan=1 rowspan=3 > The Sapphires </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "I Can't Help Myself (Sugar Pie Honey Bunch)" </th><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Gotcha" </th><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "To the End of the Earth" </th><td colspan=1 rowspan=3 > 2013 </td><td colspan=1 rowspan=1 > Emma Tomelty </td><td colspan=1 rowspan=6 > Beautiful </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Pop a Bottle (Fill Me Up)" </th><td colspan=1 rowspan=1 > Megan Brown </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Beautiful" </th><td colspan=1 rowspan=1 > Tony Prescott </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Never Be the Same" </th><td colspan=1 rowspan=2 > 2014 </td><td colspan=1 rowspan=1 > Lawrence Lim </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Can I Get a Moment?" </th><td colspan=1 rowspan=1 > Stu Gosling </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "The Day Before I Met You" </th><td colspan=1 rowspan=2 > 2015 </td><td colspan=1 rowspan=1 > Nick Waterman </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "This Ain't Love" </th><td colspan=1 rowspan=1 > Guy Franklin </td><td colspan=1 rowspan=1 > Fourth studio album </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Risk It" </th><td colspan=1 rowspan=1 > 2016 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > The Secret Daughter: Songs from the Original TV Series </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Fallin'" </th><td colspan=1 rowspan=2 > 2017 </td><td colspan=1 rowspan=2 > Emma Tomelty </td><td colspan=1 rowspan=2 > The Secret Daughter Season Two: Songs from the Original 7 Series </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <th colspan=1 rowspan=1 > "Then I Met You" </th><td colspan=1 rowspan=1 >  </td></tr>
</table>
Question:
Who directed the music videos for "What Happened to Us" and "Inescapable"?
Answer:
The music videos for the singles "What Happened to Us" and "Inescapable" were directed by Mark Alston, who previously directed the video for Mauboy's 2009 single "Let Me Be Me".