12. [-/5 Points] DETAILS LARCALC11 14.3.009. Evaluate the double integral /2 / Fr , 8 ) JA. T:/2 3 cos(8) r dr de Sketch the region R. 7 /2 1 /2 41 N -4 1 - 1 -2 -1 1 2 -2 O 7/2 2 1 -1 2 -2 -1 2 -1 O O13. [-/5 Points] DETAILS LARCALC11 14.4.004.MI. Find the mass of the lamina described by the inequalities, given that its density is p(x, y) = xy. OSX 5 4 , 0 Sys 16 - x2 14. [-/5 Points] DETAILS LARCALC11 14.4.013. Find the mass and center of mass of the lamina bounded by the graphs of the equations for the given density. y = Vx = 0 X = 9 p = ky m = ( x, y ) = ( 15. [-/5 Points] DETAILS LARCALC11 14.5.003. Find the area of the surface given by z = f(x, y) that lies above the region R. f ( x, y ) = 4x+ 4y R: triangle with vertices (0, 0), (4, 0), (0, 4)19. [-/5 Points] DETAILS LARCALC11 14.6.028. Sketch the solid whose volume is given by the iterated integral and rewrite the integral using the indicated order of integration. ( 2 - x - y Jo dz dy dx 0 2 O 20.5 22 0.5 0.5 O O 4 Rewrite using the order dz dx dy. 1 - * 2 2 - x - dz dy dx = dz dx dy18. [-/5 Points] DETAILS LARCALC11 14.6.020. Use a triple integral to find the volume of the solid bounded by the graphs of the equations. 2 = 2xy OSXs osys2 Z X 2