1.Use Green's Theorem to evaluate (2ry + cos x)dr + (3xy+ 5x)dy where C is the circle r + y = 64. 2. Let M(x,y) and N(x,y) = Show that # - M(x,y)dr + N(x,y)dy + (M) A R if R is the disk whose boundary C is the circle x + y = 1. Explain why does this result not contradict with the Green's Theorem.