27. Consider the double integral, SSp f(x, y)dA, where R is the portion of the disk x2 + y?

27. Consider the double integral, f f R f (x, y)dA, where R is the portion of the disk +y2 1, in the upper half-plane, y 2 0. Express the integral as an iterated integral. A. f _ 1 f (x, y)dydx .f(x, y)dyd:r f (x, y)dyd:r. 28. Find a and b for the correct interchange of order of integration: f (x, y)dyd:r f (x, y)d:rdy. B. JO-I foVT f (x, y) dydx D. f 01 f (x, y) dydx E. cannot be done without explicit knowledge of f (x, y). 29. Evaluate the double integral f f R ydA, where R is the region of the (x, y)-plane inside the triangle with vertices (0, 0), (2, 0) and (2, 1). 8 B. c. E.