cableway problem, mechanics

I need help to solve one single mechanics problem. Look at the attached document. I ask for good answers, all the working out included in Word format.

  

A cableway is being built (see picture below). The engine is located at the bottom, it rotates a system of two pulleys that makes the cable move and transport 2 cars to the top part. We need to find out the total work that the engine needs to do to:

1. rotate both pulleys

2. transport the 2 cars

3. and lift them to the top

Additional data:

Weight of each car = 34 g

Pulley radius = 5.5 cm , both are similar

Engine specs:

9 watts

1550 RPM