Problem 2 Which of the following is/are always true? (Select all that are.) ? If AcB and BcA then A = B If AcB then BCA ACA (Q2) If AUB = {} then B = {} Which of the following is/are always true? (Select all that are.) ? If AcAc then A = {} If AUB = A then AnB = A AnA = A (Q3) If AcB and AcBc then A = {} Which of the following is/are always true? (Select all that are.) ? If A = {} then BCA AEA AUA = A (Q4) If AcB then AccBcProblem 1 Let A be the set{1, 4, 9, 16} and let B be the set containing the squares of the first 4 integers greater than 0. ? A=B AUB=A AUB=B AB=B AB= {} AUB=AB AB=A Which of the following is/are true? (Select all that apply.) (Q1) 32