In a sporting event, the scoring area (shown here) consists of four concentric circles on the ice with radii of 9 inches, 4 feet, 5 feet, and 7 feet. If a team member lands a (43-pound) stone randomly within the scoring area, find the probability that it ends up centered on the given color. (a) red (b) white (c) blue. (Type an integer or a simplified fraction)