For the recursive function below, what is CKY$(7)?$

CKY$($n$)$

input: a non$-$negative integer

if n $<3$

val $=$ n $*$ n

else

x $=$ CKY$($n $-1)$

if n is even

y $=$ CKY$($n $-2)$

val $=$ x $*$ y

if n is odd

z $=$ CKY$($n $-3)$

val $=$ x $+$ z