calcSum$()$ was copied and modified to create calcProduct$().$ Which line in calcProduct$()$ contains an error?

$1$ public static int calcSum$($int a$,$ int b$)\{$

$2$ int s;

$3$ s $=$ a $+$ b;

$4$ return s;

$5\}$

$6$ public static int calcProduct$($int a$,$ int b$)\{$

$7$ int p;

$8$ p $=$ a $*$ b;

$9$ return s;

$10\}$

Question $50$Answer

a$.$

Line $9$

b$.$

Line $7$

c$.$

Line $8$

d$.$

There are no errors