Two circles of radius a and b are centered at the origin, as shown in the figure. As the angle increases, the point P traces out a curve that lies between the circles. (a) Find parametric equations for the curve, using as the parameter. (x(0), y(0)) = ( (b) Graph the curve with a = 3 and b = 1. O (c) Eliminate the parameter and identify the curve. ellipse Ohyperbola parabola *