Solve clearly

Question 8 10 pts Let X be a random variable such that p(X = 0) = .4, p(X = 4) = .1, p(X = 6) = .3, p(X = 10) = .2 Let Y be a random variable such that p(Y = 1) = .3, p(X = 5) = .5, p(X = 13) = .2 Let Z be a random variable such that p(Z = 0) = .4, p(Z = 4) = .1, p(Z = 6) = .3, p(Z = 10) = .2 Let X and Z be lid. What is V(X+Z)