A punter kicks a football which leaves his foot from ground level with a speed of 28 m/s at an angle of 50 degrees. At the very top of its flight, the ball hits a wandering seagull. The ball and the seagull each fall vertically from the point of the collision. Ignoring air friction, if the ball leaves the foot at t0 = 0, at what time does the football hit the unfortunate seagull?