The following questions refer to the Java class below and the program main(). public class Blue {private int a. private int b. public Blue(int aa. int bb) {a=aa; b=bb;} public void qq(Blue c) {this. a= c.a; this b=c.b - c.a;} public void fn(Blue c) {this a= this b - this a; this.b = this.b - ca;} public static void main(String [] args) {Blue x = new Blue (3.5); Blue y = new Blue (2, 6); Blue z = new Blue (1, 4); int xx=1, yy=2, zz=3; x.fn(y); zqq(y):}} At the end of the main program, x.a = a) 1 b) 2 c) 3 d) None above At the end of the main program, x.b = a) 1 b) 2 c) 3 d) None above At the end of the main program, z.a = a) 1 b) 2 c) 3 d) None above