7. II is a continuous uniform random variable taking values from -1 to 3. Y2 is an independent uniform random variables taking values from 0 to 4. Z= max(Yj, Y2). H= min(Y,, Y2). a. Find the CDF and PDF of Z. b. Find the mean and variance of Z. c. Find the CDF and PDF of H. d. Find the mean and variance of H.