5. (8 pts) On one street, a drivers speed just before an accident is uniformly distributed on [15, 25]. Given the speed, the resulting loss from the accident is exponentially distributed with mean of 1.25 times the speed. Calculate the variance of a loss due to an accident on that street. 6. (20 pts) The probability density function of a random variable X is 2.5 -k 4/X > 2). e) What is E[X ] and Var[X]