Step 1 :

(1)

The function is

Differentiate  with respect to x.

Use the formula :

The derivative of the function :

Step 2 :

(2)

The function is

Differentiate  with respect to x.

Use the formula :

The derivative of the function :

Step 3 :

(3)

The function is

Differentiate  with respect to x.

Use the formula :

The derivative of the function :

Solution :

(a)

(b)

(c)