Define work as applied in mechanics a crate of soda of mass

Question

Kindly assist in answering these questions.

1. Define work as applied in mechanics
2. A crate of soda of mass 50Kg is pulled along a frictionless inclined plane of angle A=37⁰ at a uniform speed to a floor which is 3M high. length of inclined plane is 5M.
3. Draw a free-body diagram showing all the forces acting on the crate.
4. Determine the magnitude of the force, F required to pull the crate to the top floor assuming the crate is pulled at constant velocity.