(a).

The function is .

(1). Draw the coordinate plane.

(2). Graph the function .

Graph :

Observe the graph :

The pink colour represents the increasing value of  from .

The blue dot represents the value of  which is approximalely .

The green colour represents that the function  is strictly decreasing on .

(b).

.

Take  on both sides.

Power property of logarithm : .

Exponentiate on both sides.

.

(c).

From the part (b).

Take  on both sides.

Power property of logarithm : .

Exponentiate on both sides.

.

(a).

Graph :

(b).

.

(c).

.