For the engine in exercise 6, suppose you wanted to increase the power output at 4.00 × 10³ RPM by 50 percent while retaining a compression ratio of 9.0. One way to do this would be by changing only the displacement. What would the new displacement be (in cm³)? (A: 6.0 × 10³ cm³. This is a large engine for a car; it’s easier and cheaper to achieve this performance by increasing rair in the equation for engine power, since engine power is proportional to rair.)14