Let Fi(x,y) = rityj and F2(x,y) = -yi + rj be two vector fields defined on R', i.e., the r - y plane. Let the parametrization for a curve C be F(t) = 2 sin(t) i + 2 cos(t) j. A. Calculate the circulation over the simple closed curve C for both vector fields. Are the circu- lations positive, negative, or zero? Explain why. B. Calculate the flux across the simple closed curve C for both vector fields. Are the fluxes posi- tive, negative, or zero? Explain why