Help please show steps and work will give thumbs up and good review thank you.

3. (a) [5pts.] Graphs of the Sine and Cosine Functions. Graph the sinusoidal function y = 2 cos(4r) over one period on the ry-plane below. Scale the coordinate axes appropriately and write the coordinates of the key points on the graph. Graph of y = 2 cos(4x) (b) [5pts.] Graphs of the Tangent, Cotangent and Secant Functions. Graph the function y = tan(x/5) over one period. Show the vertical asymptotes using a dashed line and label their equations. Label any intercepts with their coordinates