R sum of QR and QS . Explain your reasoning. - 3 -2 2 3 6 Q S 3. An ellipse has a domain of [-3, 3] and a range of [-5, 5] . Use the general form of the ellipse (x - h)2 (y - k)2 62 a 2 = 1 where c is the distance from the center to the focus, to answer the following questions. a. What are the values of a, b, and c ? b. Find the coordinates of the foci