Please help and clearly show all steps please

A ball is dropped from rest at point O. After falling for some time, it passes by a window of height 3.8 m and it does so in 0.49 s. The ball accelerates all the way down; let vA be its speed as it passes the window's top A and up its speed as it passes the window's bottom B. 3.8 m How much did the ball speed up as it passed the window; i.e., calculate Avdown = VB-VA? The acceleration of gravity is 9.8 m/s. Answer in units of m/s. Answer in units of m/s part 2 of 3 Your response.. Calculate the speed vA at which the ball passes the window's top. Answer in units of m/s. Answer in units of m/S part 3 of 3 1. Avup Avdown if the mass of window, with the ball moving up rather than the ball is greater than 0.1 kg down. Consider the ball's slowdown during this time: Let Up be the ball's speed (do Avup > Avdown if the mass of the ball is less not confuse the speed with the velocity) as 4. than 0.1 kg and Avup Avdown. How does the ball's slowdown Avup = UB - VA compare to its speedup Avdown on the way down