Hello could you help me understand how to draw a free body diagram for each of the situations. Also what is the net force of each situation? Thank you

A bucket is being pulled up a well by a rope at a constant rate. Ignore air resistance.

A truck is parked on a hill.

A child pushes a wagon along the flat ground causing it to accelerate.

A skier coasts to a stop as they glide up a hill.

A rain drop falls from the sky, accelerating as it falls.