Im not sure, i just took the average velocities of between the 2 distances and asssuming i could use them as the inital and final velocities over the total amount of time taken to get from A to C
I tried this but I don't know if it makes sense:
Average velocity from A to B = 22/2 = 11m/s
Average velocity from B to C = 104/4 = 26m/s
(26-11)/6 = 3.75m/s