Just d) please

Suppose X is a random variable with the following distribution. Use this information on X to answer parts a) - d). X 2 Probability 0.25 0.25 a) Find the probability of X - 1. (1pt) b) Find the probability of X = 1 conditional on X 2 1. (1pt) c) Find the mean and variance of X (2pts) d) Suppose Y is another variable with mean zy = 3 and variance of = 2. Find the mean and variance of Z - X + 2Y Hint: You can call 2Y as U, then Z - X + U. Find mean and variance of U before using rules 1 and 2 from Handout 9