You throw a frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the frisbee. ignoring air resistance, the torque exerted about its center of mass by gravity isa. 0.b. mgrc. 2mgrd. a function of the angular velocity. e. small at first, then increasing as the frisbee loses the torque given it by your hand.(answer should be a. but explain why)