Let f: R + R be given by f(x, y) = (x2 + y, y, x + y). Define R= f-1([0,1] (0,3) [0, 0)). Consider log(x2 + y) dA. I= 1 (x2 + y2) Calculate I. Give your answer as a decimal correct to three decimal places. (To be clear, if your answer is an integer, for example you need to enter 10.000.)