QUESTION 5 Are the variables X, Y independent? 0 True 0 False QUESTION 6 If X, Y are two discrete random variables with joint cumulative distribution function ny(X,]/) , then P({X 5X} U {Y Sill] = FxCX) + F141!) FxKXW) 0 True 0 False QUESTION 7 Let X, Y be joint random variables, uniformly distributed over the circle of radius 1: (X2 + Y2) S 1 Then, X and Y are independent random variables. 0 True 0 False