I really need help with this

A marble rolls down a ramp, on to a horizontal table that is 1.0504081 m high, through a set of photogates that are spaced 0.022 m apart, and then off the table to become a horizontal projectile. Below is a list of photogate times: Trial gate 1 blocked time (s) gate 2 blocked time (s) time through both (s) 1.6653 1.7097 0.0444 N 2.3832 2.4271 0.0439 m 7.8822 7.9265 0.0443 What is the speed of the marble through the photogates? V SUBMIT