An express mail truck delivers mail to various companies situated along a central avenue and often goes back and forth as new mail arrives. Over some period of time, 0 t 10, its velocity (in km per hour) can be described by the function: v(t) = (t 5)e^ t . (a) Find the displacement over this period of time. (b) How much gasoline was consumed during this period of time if the vehicle uses 1/2 liters per km. To answer (b), you need to find the total distance that the vehicle actually covered during its trip). Use fundamental theorem of calculus.Ans: a)23(1/3)km b)32.51km