1. When parking a car in a downtown parking lot, drivers pay according to the number of hours or fraction thereof. The probability distribution of the number of hours cars are parked has been estimated as follows: X 1 2 3 4 5 6 7 8 P(X) 0.206 0.143 0.129 0.098 0.061 0.027 0.036 0.3 1. Calculate the mean and standard deviation of the number of hours that a car is parked. 2. The cost of parking is $3.75 per h