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:
Max Park
Table title:
Notable rankings
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Type </th><th colspan=1 rowspan=1 > Time (sec.) </th><th colspan=1 rowspan=1 > World Ranking </th></tr>
<tr> <td colspan=1 rowspan=2 > 3x3x3 </td><td colspan=1 rowspan=1 > single </td><td colspan=1 rowspan=1 > 4.40 </td><td colspan=1 rowspan=1 > 4th </td></tr>
<tr> <td colspan=1 rowspan=1 > average </td><td colspan=1 rowspan=1 > 5.83 </td><td colspan=1 rowspan=1 > 2nd </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 4x4x4 </td><td class="highlighted"  colspan=1 rowspan=1 > single </td><td class="highlighted"  colspan=1 rowspan=1 > 18.42 </td><td class="highlighted"  colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > average </td><td class="highlighted"  colspan=1 rowspan=1 > 21.13 </td><td class="highlighted"  colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=2 > 5x5x5 </td><td colspan=1 rowspan=1 > single </td><td colspan=1 rowspan=1 > 37.28 </td><td colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=1 > average </td><td colspan=1 rowspan=1 > 42.36 </td><td colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=2 > 6x6x6 </td><td colspan=1 rowspan=1 > single </td><td colspan=1 rowspan=1 > 1:13.82 </td><td colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=1 > average </td><td colspan=1 rowspan=1 > 1:17.10 </td><td colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=2 > 7x7x7 </td><td colspan=1 rowspan=1 > single </td><td colspan=1 rowspan=1 > 1:47.89 </td><td colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=1 > average </td><td colspan=1 rowspan=1 > 1:51.63 </td><td colspan=1 rowspan=1 > 1st </td></tr>
<tr> <td colspan=1 rowspan=2 > 3x3x3 One-Handed </td><td colspan=1 rowspan=1 > single </td><td colspan=1 rowspan=1 > 7.66 </td><td colspan=1 rowspan=1 > 4th </td></tr>
<tr> <td colspan=1 rowspan=1 > average </td><td colspan=1 rowspan=1 > 9.42 </td><td colspan=1 rowspan=1 > 1st </td></tr>
</table>
Question:
What records does Park hold in the 4x4x4 category?
Answer:
Park holds the world records for single and average of five 4x4x4 solves: 18.42 seconds and 21.13 seconds, respectively.