2. Calculate each of the following quantities 14 points) (a) The double integral dA, where R is the triangular region in the-with 1 +22 vertices (0,0), (1.1), and (1,0). (b) The area of the region lying inside the drele below the line ,-z, and above the line +y2 = 4, to the right ofthe line z-l, 0.