Time in leaderboard

Any ideas how to add time of solving quiz which is available in statistics into the leaderboard? I have edited View_FrontToplist.php and added the place for it but I don’t know how to implement the time form statistics to this place. This is how the code looks like at the moment:

public function show()
{
?>
<div style=”margin-bottom: 30px; margin-top: 10px;” class=”wpProQuiz_toplist”
data-quiz_id=”<?php echo $this->quiz->getId(); ?>”>
<?php if (!$this->inQuiz) { ?>
<h2><?php _e(‘Leaderboard’, ‘wp-pro-quiz’); ?>: <?php echo $this->quiz->getName(); ?></h2>
<?php } ?>
<table class=”wpProQuiz_toplistTable”>
<caption><?php printf(__(‘maximum of %s points’, ‘wp-pro-quiz’), $this->points); ?></caption>
<thead>
<tr>
<th style=”width: 40px;”><?php _e(‘Pos.’, ‘wp-pro-quiz’); ?></th>
<th style=”text-align: left !important;”><?php _e(‘Name’, ‘wp-pro-quiz’); ?></th>
<th style=”width: 140px;”><?php _e(‘Entered on’, ‘wp-pro-quiz’); ?></th>
<th style=”width: 60px;”><?php _e(‘Points’, ‘wp-pro-quiz’); ?></th>
<th style=”width: 75px;”><?php _e(‘Result’, ‘wp-pro-quiz’); ?></th>
<th style=”width: 100px;”><?php _e(‘Time’, ‘wp-pro-quiz’); ?></th>
</tr>
</thead>
<tbody>
<tr>
<td colspan=”5″><?php _e(‘Table is loading’, ‘wp-pro-quiz’); ?></td>
</tr>
<tr style=”display: none;”>
<td colspan=”5″><?php _e(‘No data available’, ‘wp-pro-quiz’); ?></td>
</tr>
<tr style=”display: none;”>
<td></td>
<td style=”text-align: left !important;”></td>
<td style=” color: rgb(124, 124, 124); font-size: x-small;”></td>
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
</div>

Please let me know if anybody has a suggestion how to do it. I will be more than grateful.