To solve this problem we must apply Torricelli equation:

where:
v = final velocity
vo = initial velocity
α = acceleration
d = distance
Lets use the information of the first row of the table to find a:

Now we can calculate distances a, b and c:

So distance a = 107 ft.
Now we have:

So distance b = 60 ft.
Finally:

So distance c = 7 ft.