Inclined place friction problem

[wbetting]

Homework Statement

Body A in Fig. 6-33 weighs 96 N, and body B weighs 88 N. The coefficients of friction between A and the incline are μs = 0.54 and μk = 0.24. Angle θ is 42°. Let the positive direction of an x-axis be down the slope. What is the acceleration of A if A is initially (a) at rest, (b) moving up the incline, and (c) moving down the incline

Homework Equations

fs=usFn
Fk=ukFN
a=v^2/R

The Attempt at a Solution

I am so confused on this problem i dot even know where to start but I know part a is 0!

 

[wbetting]

Here is the diagram

 

[azizlwl]

Let's start with by drawing a free-body diagram for each mass.
Mass A has a force downward to center of Earth equal to its weight, the string that pulls it and third the friction that will appose the motion of the mass.
Mass B has 2 forces acting on it. Its weight and the string that pull up.

Remember if there is the net forces(ƩF≠0) on each mass then there's acceleration as in Newton's First Law.
F_net=ma