Suppose your waiting time for a bus in the morning is uniformly distributed on [0, 12], whereas waiting time in the evening is uniformly distributed on [0, 16] independent of morning waiting time. (a) if you take the bus each morning and evening for a week, what is your total expected waiting time? (assume a week includes only monday through friday.) [hint: define rv's x1, , x10 and use a rule of expected value.]