$\"\"$

(a).

The equations are $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$

Graph :

(1) Draw the coordinate plane.

(2) Graph the equations $\"\"$ , $\"\"$ and $\"\"$ on the same graph in first quadrant.

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(b).

By using the graphing utility :

The volume can be calculated by $\"\"$ .

Here $\"\"$ , $\"\"$ .

$\"\"$

By using the graphing utility the volume is $\"\"$ .

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(a).

Graph :

$\"\"$

(b).

Volume is $\"\"$ .