The equation S = -16t + vot + So gives the height s, in feet above ground level, at the time t, in seconds, of an object thrown directly upward from a height so feet above the ground and with an initial velocity of vo feet per second. A ball is thrown directly upward from a height of 28 feet above the ground with an initial velocity of 80 feet per second. Find the time interval during which the ball will be more than 92 feet above the ground. The ball is higher than 92 feet between Vo (smaller value) and (larger value) seconds.