(a).

The equation is and the point is .

Apply derivative on each side with respect to .

.

.

.

The slope at the point ..

The slope of the normal line is perpemdular to the slope of the tangent line.

The slope of the normal line is .

The normal line equation at the point ans slope .

.

.

(b).

Graph:

 .

(c).

The normal line of the equation of  is .

Substitute in the equation .

and

Substittue in the function .

The another point is .

(a).

(b).

(c).The another point is .