let R be the region bounded by the line y=0, by the upper partof the circle x2+y2=4, and by the upper partof the circle x2+y2=9. Find the circulationof the force F= ( 5cosx-y3)i+ (x3+ 4x+5siny)j around the curve C , where C is the boundary curve of theregion R , oriented counterclockwise. Draw the region R precisely,and show the orientation of the curve C by putting arrows on C
