A 180-hp sports car of frontal area \(1.72 \mathrm{~m}^{2}\), with a drag coefficient of 0.31 , requires \(17 \mathrm{hp}\) to cruise at \(100 \mathrm{~km} / \mathrm{h}\). At what speed does aerodynamic drag first exceed rolling resistance? The rolling resistance is 1.2 percent of the car weight, and the car mass is \(1250 \mathrm{~kg}\). Find the drivetrain efficiency. What is the maximum acceleration at \(100 \mathrm{~km} / \mathrm{h}\) ? What is the maximum speed? Which redesign will lead to a higher maximum speed: improving the drive train efficiency by 6 percent from its current value, reducing the drag coefficient to 0.29 , or reducing the rolling resistance to 0.91 percent of the car weight?