is the value of coordinate corresponding to the value of .

 is the value of coordinate corresponding to the value of .

(a)

Find .

Observe the graph , at  the value of  is .

So .

Observe the graph , at  the value of  is .

So .

Substitute  in .

Substitute  in the above expression.

.

(b)

Find .

Observe the graph , at  the value of  is .

So .

Observe the graph , at  the value of  is .

So .

Substitute  in .

Substitute  in the above expression.

.

(c)

Find .

.

Observe the graph , at  the value of  is .

So .

Observe the graph , at  the value of  is .

So .

Substitute  in .

Substitute  in the above expression.

.

(d)

Find .

Observe the graph , at  the value of  is .

So .

Observe the graph , at  the value of  does not exist.

Substitute  in .

Does not exist, because at  is not in the domain of .

(e)

Find .

.

Observe the graph , at  the value of  is .

So .

Observe the graph , at  the value of  is .

So .

Substitute  in .

Substitute  in the above expression.

.

(f)

Find .

.

Observe the graph , at  the value of  is .

So .

Observe the graph , at  the value of  is .

So .

Substitute  in .

Substitute  in the above expression.

.

(a) .

(b) .

(c) .

(d) Does not exist, because at  is not in the domain of .

(e) .

(f) .