(distance between the two-goal lines on the football ground is 100 yards) A football player

(distance between the two-goal lines on the football ground is 100 yards) A football player runs from his own goal line to the opposing teams goal line, returning to his thirty-yard line, all in 25.5 s. Calculate his average speed and the magnitude of his average velocity. (Enter your answers in yards/s.) A) calculate his average speed. B) calculate the magnitude of his average velocity.