When performing a differential compression test on a Lycoming engine, you observe a pressure reading of 45/80 for one of the cylinders. The leakage can be heard at the exhaust pipe outlet. Is this okay? Group of answer choices Yes...this is an excellent compression number No...the sound at the exhaust pipe means that the leakage is from bad piston rings. No...the sound at the exhaust pipe means that the leakage is from an exhaust valve which is unacceptable