What is the value of b after the code is executed? public class TwoD { public static void main(String args[]) { int a[][] = new int[3][]; a[0] = new int[]{1, 2, 3}; a[1] = new int[]{4, 5, 6, 7}; a[2] = new int[]{8, 9}; int b = a[1][2]; } }