answer I,II,III PROVIDE code in php

Q.2 Write the PHP program and find the output for the code given below - $a = 5; $b = &$a; $a = 7: echo "\$a = $a and \$b = $b "; I III. Sarr=array(5,1,8,9,10); Echo Sarr[1]; Echo Sarr[3]; Print r($arr); ?> T