Marla is running clockwise around a circular track. she runs at a constant speed of 4 meters per second. she takes 46 seconds to complete one lap of the track. from her starting point, it takes her 12 seconds to reach the northernmost point of the track. impose a coordinate system with units in meters, the center of the track at the origin, and the northernmost point on the positive y-axis. (round your answers to two decimal places.) (a) give marla's coordinates at her starting point.