Consider the following struct definition and assume that the computer has a $32-$bit architecture. Please answer the following two questions:

struct S $\{$

double $x$;

int $y[2]$; $//$an integer array with size $2$

char $z$;

$\}$;

S a; $//$a is a variable of type S

a$.$ How many bytes will be allocated for variable $a,$ if the memory is unaligned?

b$.$ How many bytes will be allocated for variable a$,$ if the memory is word$-$aligned?