I dont understand what it is asking me to do.

It says 3rd and 4th echo command. I only have two up to this point. I dont understand what it is asking me to do right now. The code block below displays a list of two letters from the Latin alphabet using echo statements. But these two letters are NOT my favorite letters! In this code challenge, we’ll change this block of code to display my real favorite letters. We’ll also modify it to use an array so that it’s easier to add a new letter in the future. Before the first echo statement, create an array called letters. Give that letters array one element with a value of “D”. This i s the code I have so far. '''php <?php $letters = array("D", "G", "L") ?> <?php echo "My favorite " . count($letters) . " letters are these:\n" ; foreach($letters as $letter){ echo $letter . "\n"; } ?> '''