<image>Xiaoyang walks at a constant speed on the fan-shaped stage shown in Figure 1. Starting from point O, he follows the direction indicated by the arrow, passing point M and then reaching point N, taking a total time of 70 seconds. A camera positioned at a fixed location records Xiaoyang's walking process. Let t (in seconds) be the time Xiaoyang has been walking, and y (in meters) be his distance from the camera. The graph representing the function relationship between y and t is shown approximately in Figure 2. The possible fixed position of the camera could be point ______ in Figure 1 (choose from points P, N, Q, M, O).
