Concentric circles are drawn in the coordinate plane. a diameter is drawn in the small circle and in the large circle, and the endpoints of the two diameters are at a(5, 8), b(9, 8), t(6, 8), and u(8, 8). determine the length of the diameter of the largest circle and the center of the circles. a. width = 2 units, center = (1, 0) b. width = 2 units, center = (7, 8) c. width = 4 units, center = (7, 8) d. width = 8 units, center = (1, 0)