Consider the following operations performed on a Stack with array implementation of size

$10.$ How many elements stay in the stack after all these operations?

StackArray stack $=$ new StackArray$(10)$;

stack.push$(9)$;

stack.pop$()$;

stack.push$(19)$;

stack.push$(29)$;

stack.push$(39)$;

stack.push$(49)$;

stack.push$(59)$;

stack.push$(69)$;

stack.pop$()$;

Your answer:

$6$

$4$

$7$

$5$