What is $y$ after the following switch statement is executed?

int $x=3$; int $y=4$

switch

case $6$:$y=0$

case $7$:$y=1$

default: $y+=1$;

$\}$

a$.1$

b$.2$

c$.3$

d$.4$

e$.0$

Analyze the following program fragment:a$.$ The program has a compile error because the required break statement is missing in the switch statement.b$.$ The program has a compile error because the required default case is missing in the switch statement.c$.$ The switch control variable cannot be double.d$.$No errors.