The function is .

(a).

Find .

Substitute .

.

.

(b).

Find .

.

Let 

Apply derivative on each side with respect to .

Apply Second Fundamental Theorem of Calculus:

If  is continuous on an open interval  containing , then for every  in the interval,    .

Substitute .

.

(c).

Find .

Apply derivative on each side with respect to .

Apply product rule of derivatives: .

.

(d).

Find .

Substitute .

.

(a). .

(b). .

(c). .

(d). .