Problems 7 - 10: Evaluate the double integral over the given region. (5 Points Each) D SS sin 13x dA, R = (x, y): O=x=-,.0sys R 8SS 4x sin xy dA, R = {(x, y): 0 =x=n, 0sy=1} R\fFind the volume under the surface z = f(x,y) and above the rectangle with the given boundaries. 11) z = 8x + 4y + 7; R = {(x, y): 0=x=1, 1sy =3}