Maths問題請教 入黎幫我手 ar !!! ( 數學 )

A mass block of 20 kg is placed on a plane inclined at an angle of 20∘to the horizontal (Figure 1). The block slides down the inclined plane with an acceleration of 10 m/s2.
a)Sketch the free body diagram for the block and label all forces acting on it;
b)Sketch and resolve the forces component along the plane;
c)Sketch and resolve the forces component perpendicular to the plane;
d)Determine the friction force between the block and the plane; and
e)Determine the normal reaction on the block exerted by the plane