What is the ideal mechanical advantage and what are the

Question

1. A 1050 rev/min motor has a drive pulley 3 in. in diameter, and the driven pulley is 9 in. in diameter. What is the ideal mechanical advantage, and what are the revolutions per minute for the output pulley?
2. What is the input work of a 22 percent efficient gasoline engine if during each cycle it performs 330 J of useful work?
3. A 60 W motor lifts a 5 kg to a height of 3 m in 9 s. What us the output power.