heree ok. just refer the attach beloww. thanks plss help

. A tennis ball moving horizontally to the left at 40 mIs hits a racket and rebounds hori- zontally to the right at 30m/s. If the maw of the ball is loograms, find the impulse of the force ( in kg-m/ s ) exerted on the ball by the racket.A man of mass m= 65 kg jumps off a table at height h= In. while waiting he bend his knees such that the time of contact is O.Is. refer on thissss Determine the force exerted by the floor on youIf the student does not bend his knees the time of 10 n/s. Determine the new force exerted tutor just base on this by the floor now