I need help...I can't seem to get past this. I'm stuck on the output for this php array.

<?php
//edit this array
$contacts[] = array(
  'name' => 'Alena Holligan',
  'email' => 'alena.holligan@teamtreehouse.com'
);
$contacts[] = array(
  'name' => 'Dave McFarland',
  'email' => 'dave.mcfarland@teamtreehouse.com'
);
$contacts[] = array(
  'name' => 'Treasure Porth',
  'email' => 'treasure.porth@teamtreehouse.com'
);
$contacts[] = array(
  'name' => 'Andrew Chalkley',
  'email' => 'andrew.chalkley@teamtreehouse.com'
);
$name_alena = 'Alena Holligan';
$email_alena = 'alena.holligan@teamtreehouse.com';
$name_dave = 'Dave McFarland';
$email_dave = 'dave.mcfarland@teamtreehouse.com';
$name_treasure = 'Treasure Porth';
$email_treasure = 'treasure.porth@teamtreehouse.com';
$name_andrew = 'Andrew Chalkley';
$email_andrew = 'andrew.chalkley@teamtreehouse.com';

echo "<ul>\n";
//$contacts[0] will return 'Alena Holligan' in our simple array of names.
echo "<li>$name_alena : $email_alena</li>\n";
echo "<li>$name_dave : $email_dave</li>\n";
echo "<li>$name_treasure : $email_treasure</li>\n";
echo "<li>$name_andrew : $email_andrew</li>\n";
echo "</ul>\n";