Following are three faulty programs. Each program contain a test case that trigger a failure. For each program, answer the following questions. A. Find out the fault. B. Find out a test case that does not execute the fault, if possible. C. Find out a test case that executes the fault, but does not result in an error state, if possible. D. Find out a test case that results in an error, but not a failure, if possible. E. Repair the fault and prove that the given test now produces the expected output.

public static int lastZero (int[] x) { //Effects: if x==null throw NullPointerException // else return the index of the LAST O in x. // Return -1 if o does not occur in x == for (int i = i 0; i = 0) { count++; } } return count; } // test: x=(-4, 2, 0, 2] // Expected = 2 0; public static int oddorPos (int[] x) { //Effects: if x==null throw NullPointerException // else return the number of elements in x that // are either odd or positive (or both) int count = for (int i = 0; i 0) i> ) { count++; } } return count; } // test: x=(-3, -2, 0, 1, 4] // Expected = 3