$\"\"$

The horizontal line is $\"\"$ intersects the curve is $\"\"$ .

Let the point $\"\"$ .

Find $\"\"$ .

Area of the shaded region is $\"\"$ .

$\"\"$

Substitute point $\"\"$ in the $\"\"$ .

$\"\"$

Substitute $\"\"$ in the area of the integral function.

$\"\"$

Therefore, $\"\"$ .

Substitute $\"\"$ in the $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .