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9) Consider the solid S in the first octant bounded by z = x and 2x+ y +z =15. (20 pts) a) Draw the region in the xz-plane and setup a threefold iterated integral integrating with respect to y first (i.e. dy d* d*) that when evaluated gives the volume of S. b) Draw the region in the xy-plane and setup a threefold iterated integral integrating with respect to z first (i.e. dz d* d*) that when evaluated gives the volume of S. Do not evaluate these iterated integrals. a) b)7) Graph the solid and the corresponding region in the xy-plane over which the threefold iterated integral JJ [ f(x,y,z) dz dxdy is taken. Do not evaluate this iterated integral (8 pts) S R 8) Setup a triple integral that gives the volume of the solid S bounded by z =9-x , z =9- y' , and z =0 then rewrite this integral as a threefold iterated integral. Do not evaluate this iterated integral. (10 pts) S R *