What's the correct answer to the one with the X

A football quarterback runs 11.3 m straight down the playing field in 2.60 s. He is then hit and pushed 2.70 m straight backward in 1.80 s. He breaks the tackle and runs straight forward another 15.3 m in 5.30 s. Calculate his average velocity (a) for each of the three intervals 4.346 V units m/s -1.500 V units m/s V3= 2.887 V units m/s and (b) for the entire motion. U = 2.57 X units m/s