2. Set up, but do not solve the following integrals. Include all details. [35 marks] la.] f (x, y) dA where f(x,y) = ax + by and D is the triangle with vertices (0, 0),(-4, -1), and (-1, -4). Do not use change of variables. 1b.J J f(z,y) d'A where f(z,y) = 12 4 7 and D is the region bounded by x2 + (y - 1)2 =1[c.] f(x, y)dA where f(x, y) = y? and D is the region bounded by D 4x2 + 16y? = 64. Use change of variables twice, and give the final set up in polar coordinates