Please show all work. Thanks.
8. Set h(zw) = (2x sin y-产+4) i +ãcos y + 2e. y2) j. Let C be the curve nea h(r)-dr- (a) 0 (b) 15m (c) 2Ï (d)-4Ï (e) none of the above 9. Set h(x, y) 2yij. Let C be the boundary of the triangle whose vertices are (0,0), (3,3), (0,3) with counterclockwise orientation. h(r).dr = (a) 0 (b) 9/2 (c) 4/3 (d) 27/4 (e) none of the above 10. Evaluate the line integral where C is the square with vertices (0,0), (1.0), (1,1), (0,1) (a) 0 (b) 1 (d) -1/3 (e) none of the above