<image> As shown in the figure, when a ball is hit in a certain direction, the flight path of the ball is a parabola. If air resistance is ignored, the flight height h (unit: m) of the ball has a functional relationship with the flight time t (unit: s) given by h = 20t - 5t^2.
(1) Find the flight height of the ball at t = 1s.
(2) Find the total time from the ball's launch until it lands.