He put a rake against the wall and it makes a 35 degree angle with respect to the floor.
Stoffle was 28 kg during the annual body examination this year.

If Stoffle is climbing at a constant velocity on the rake, what is the magnitude of the normal force between him and the rake?
N

What is the frictional force exerted on Stoffle by the rake?
N

The rake can't be too slippery, to provide enough friction, what is the minimum coefficient of friction between the rake and Stoffle?