You are considering putting an advertisement sign on your car for additional income. The sign has a shape of cylinder, with 1.5m long, and 0.75 diameter to be installed on top of your car. You wanted to install it such that its circular surfaces are facing the front and back of the car (see Figure 3) to reduce power requirement from vehicle. But your friend argued that it is better to have the circular surfaces facing the sides of the car. Assume the car is driven at a speed of 90 km/h, and density of air 1.204 kg/m. Defend your argument by comparing the additional power requirement between the two sign orientations. Propose one way to further reduce power requirement of your car, with the sign installed. 1.5m 0.75m