A 2500-lb car is designed with a 120-inch wheelbase. The center of gravity is located 22 inches above the pavement and 40 inches behind the front axle. If the car is on a road with poor, wet pavement, what is the maximum tractive effort that can be developed if the car is (a) front-wheel drive and (b) rear-wheel drive? How far back from the front axle would the center of gravity have to be to ensure that the maximum tractive effort developed for front- and rear-wheel-drive options is equal (assume that all other variables are unchanged)?