Determine the range of the following graph: y
12
11
10
9
8
7
6
5
4.
NCS
1
-12-11-10-9-8-7-6 -5 4 3-2-11
1 2 3 4 5 6 7 8 9 10 11 12
-2
-3
-4
16
-7
-8
-9
-10
-11
-12

Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z) = xyi + 5zj + 7yk, c is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 81.