$7\mathrm{.}11$ A rectangular loop carrying $10A$ of current is placed on $z=0$ plane as shown in Figure $7\mathrm{.}31.$ Evaluate $H$ at

$($a$)(2,2,0)$ Verify your answer using matlap the code should also plot the $H$ as function of $p,$ alpha, $z($cilyndrical$)$ every where. Hint use the command crul in the matlap