Given the following classes: public class A { private int x = 1; private int y = 2; public int m) { } return x + y; public int x() { return x; } } public class B extends A { private int x = 300; private int z = 400; public int m() { return super.m() +z; } public int x2() { return 2 this.x(); } } Consider the following code: A a1 = new A(); A a2 new B(); Ba3 new B(); For each expression below, indicate the current type of the reference in front of the dot, the true type, and the result of the expression. Write Illegal" for the result if the expression is not allowed. EXPRESSION 1) al.m 2) a2.m 3) a2.x20 4) ((B)a2).x20) 5) a3.x20 CURRENT TYPE TRUE TYPE RESULT