Free Fall!

Classical Mechanics Level 2

At time $t=0$ , apple 1 is dropped from a bridge onto a roadway beneath the bridge. Somewhat later, apple 2 is thrown down from the same height. The figure gives the vertical positions y of the apples versus t during falling, until both apples have hit the roadway. With approximately what speed is apple 2 thrown down? Take $g=9.8 \text{ m/s}^2$ .