Write PHP that calculates the average value and the maximum value for any associative array $rating that follows the following format. You may assume $ratings values are always non-negative. The below array has 9 values, but future examples could have more keys/values.

$rating = array(

"TPM"=>4, "AOTC"=>2, "ROTS"=>4,

"ANH"=>4, "TESB"=>5, "ROTJ"=>4,

"TFA"=>2, "TLJ"=>3, "TROS"=>1);

#your php code here

echo $average; #prints 3.2222222222222

echo " ";

echo $maxval; #prints 5