2. Let X be a discrete random variable with domain 2,3,5, and distribution pX, given by: px=10x a) [5 points] Graphically tepresent the cumulative density function of X. b) [5 points] Compute E[X, the expected value of X. c) 15 points] Compute V[X], the variance of X. 3. Let X be a real random variable with the following density function: f(x)=[1Lifx[5,6]otherwiseL a) (5 points] Graphically represent the cumulative density function of X. b) [5 points] Compute E[X, the expected value of X