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1. Let X denote the number of times a photocopy machine will malfunction: 0, I, 2 or 3 times, on any given week. Let Y denote the number of times a technician is called on an emergency call. The joint p.m.f. p(:c,y) is presented in the table below: 1.1. Find the conditional pmf of X given 1" = 0, 1,2. 1.2. Find E[X|Y = 2]. 1.3. Find Var(X|Y = 1)