Consider the following code fragment public class A { public void m1() { System.out.println("m1"); public void m2() { System.out.println("m2"); public static void main (String[] args) { } m1(); // Line 1 m2(); // Line 2 } Which lines have compilation errors? (3 marks) Consider the following Java class public class B { public static int x; public int y; public B() { x = 0; y = -1; } public void inc() { } ++X; ++y; } } } and the following code fragment B ref1 = new B(); B ref2 new B(); refl. inc(); ref2.inc(); Which values do ref2.x and ref 2. y have after executing this code? new Mac p