Consider the semi-annular region in the upper-half plane

Consider the semi-annular region D in the upper-half plane that is between the circles x2 + y2 = 1 and x2 + y2 = 4. Let C be the boundary curve of Region B with the positive orientation. a. [3%] Draw region D and label it with arrows indicating the positive orientation on all 4 pieces of the C. lo. [12%] Use Green's theorem to calculate the following integral [C [y2 dx + 31:): dy] '