(a)

The functions are and .

Find .

Definition of composite  function : .

To find , substitute  in the function .

To find , substitute  in the function .

.

(b)

Find .

To find , substitute  in the function .

To find , substitute  in the function .

.

(c)

Find .

To find , substitute  in the function .

To find , substitute  in the function .

.

(d)

Find .

To find , substitute  in the function .

To find , substitute  in the function .

.

(a)  .

(b)  .

(c)  .

(d)  .