8 - 3 = 5
D.5
to find the average you need to multiply depending on the sittuation
I assume
has counterclockwise orientation when viewed from above.
By Stokes' theorem,

so we first compute the curl:


Then parameterize
by

where the
-component is obtained from

with
and
.
Take the normal vector to
to be

Then the line integral is equal in value to the surface integral,



On the X side it’s +1
Hopefully this helps
You have to multiply 3 times 2= 6 + 4 = 10 so the answer is 10 I hope this help...