Step 1:

The function is $\"\"$ .

Definition of the line integral :

If F is a continuous vector field on a smooth curve C, the function $\"\"$ in the interval $\"\"$ .

Then the line integral of F on C is $\"\"$ .

The function is $\"\"$ and $\"\"$ in the interval $\"\"$ .

Then $\"\"$

$\"\"$

The line integral of $\"\"$ is

$\"\"$

Solution :

$\"\"$ .