Problem 5-102 Friction force

A skier of mass $79\; kg$ is sliding at constant velocity down a slope inclined at $8.3^\circ$ to the horizontal. Determine the magnitudes of:

(a) the normal force exerted on the skier.
(b) the frictional force exerted on the skier.

Which is the correct FBD for the skier?

(A)

(B)

(C)

(D)