1. Given the planar lamina in the first quadrant bounded by the graphs: y = 4/x, x = 1 and x = 2, with an area density. o(x,y) = kxy, a) sketch the lamina, and b) find the mass, center of mass, and Iy of the lamina. 2. a) Sketch the portion of the surface: z=x+ y inside: x+y-=4, and find its surface area. b) Find the volume of the solid in the first octant bounded by: z=x- +y and x2 + y =4