Let r denote the region in the first quadrant that is bounded by the y-axis, y = 2x, and is between and x^2 + y^2 = 1 and x^2 + y^2 = 2. suppose that the mass density at each point in r is inversely proportional to its distance from the origin. a. sketch r b. set-up double integrals in polar coordinates that equal the area of r, the mass of r, and the y-coordinate of the center of mass of r.