Can someone please answer this: 1. A 200-N wagon is to be pulled up a 30 deg incline at constant speed. How large a force parallel to the incline is

Can someone please answer this:

1. A 200-N wagon is to be pulled up a 30 deg incline at constant speed. How large a force parallel to the incline is needed if friction effects are negligible?

2. In the figure below the pulleys are frictionless and the system hangs at equilibrium. If Fw3, the weight of the object on the right, is 200N, what are the values of Fw1 and Fw2?

3. A truck is travelling at a constant speed up a hill with a normal force of 1360N. The force of the kinetic friction acting on the truck is 266N. What is the coefficient of kinetic friction between the truck and the road?