Given the following classes:

public class A $\{$

private int x $=15$

public class B extends A private int x $=100$ ; private int z $=200$

private int y $=30$

public int sum$()\{$ return x $+$ y

public int sum$()\{$

return super.sum$()$ z

$\}$

public int getX $()\{$ return this.x;

public int getX$20($ return this.getX$()*$this$.$x;

$\}$

$\}$ Consider the following code:

B a$1=$ new B$()$; A a$2=$ new B$0)$;

For each expression below, indicate the result of the expression. Write "Illegal" for the result if the expression is not allowed.

EXPRESSION

$1)$ a$2.$getX$()$

$2)(($B$)$a$2).$getX$()$

$3)$a$2.$getX$2()$

$4)(($B$)$a$2).$getX$2()$

$5)$a$1.$sum$()$