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(A) Random variables X and Y in Example 4 .1 and random variables Q and G in Quiz 4 .2 have joint PM F s: q = 0 0.06 0.18 0.24 0.12 q = 1 0.04 0.12 0.16 0.08 (I ,3 Are X and Y independent? (2) Are Q and G independent? (B) Random variables X 1 and X 2 are independent and identically distributed with prob- ability density function lx/Z 05x52, fx (x) = I 0 otherwise. (4'144) (1) What is the joiniPDF fxl, X2 (x1 , x2)? (2) FindtheCDFon = max(X1, X2)