Question: Please help, Thank you! Consider the random variables X and Y with the probability distributions given in the following tables. X 3 5 8 a.

Please help, Thank you!

Consider the random variables X and Y with the probability distributions given in the following tables. X 3 5 8 a. Find the mean and standard deviation for each random variable. P(X) 0.5 0.15 0.35 b. Let Z = X + X + 1. Find the mean and standard deviation for Z. c. Let Z = 2X + 1. Find the mean and standard deviation for Z. Remember that X + X # 2X. Y 4 5 6 7 d. What is the expected value for X - Y? P(Y) 0.4 0.3 0.18 0.12

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