The multiflash photograph in the accompanying figure shows two balls falling from rest. The vertical rulers are marked in centimeters. Use the equation s = 490t (the freefall equation for s in centimeters and t in seconds) to answer the following questions. . . . It takes sec for the balls to fall the first 40 cm. 10 cm (5 flashes) (Type an integer or a simplified fraction.) 40 cm (9 flashes) The average velocity for the period where the balls fell 40 cm is |cm/sec. (Simplify your answer.) 90 cm (13 flashes) The balls were falling cm/sec when they reached the 40-cm mark. (Simplify your answer.) Their acceleration at 40 cm was |cm/sec2. 160 cm (17 flashes) (Simplify your answer.) During the first 40 cm, the light was flashing about flashes/sec. (Round to the nearest hundredth as needed.)