We saw that the age of a randomly selected driver in a fatal car crash is a random variable with probability density function given by ƒ(t) = 0.06049e^-0.03211t for t in [16, 84].

(a) Find the expected age of a driver in a fatal car crash.
(b) Find the standard deviation of the distribution.
(c) Find the probability that such a driver will be younger than 1 standard deviation below the mean.
(d) Find the median age of a driver in a fatal car crash.