The burning of gasoline in a car releases about 3.0 104 kcal/gal. If a car averages 38 km/gal when driving at 95 km/h, which requires 25 hp of power, what is the efficiency of the engine under those conditions? [One horsepower is equal to 745.7 Watts.]

a. Sketch the situation, defining all your variables.

b. What physics equation(s) will you utilize in order to solve this problem? For each equation you list, give a justification for why it applies to this situation.

c. Apply your equation(s) to solve the problem as an algebraic expression(s).

d. Calculate your numerical answer(s). Show the units of your answer(s), and how you got them.