1. F=ma
Here we have an acceleration = 2.3 and a mass = 14
So...
F = (14)(2.3)
F = 32.2 N
2. F = ma
Here we have an acceleration = 6.4 and a force = 1473
Rearrange your equation for m
F/a = m
1473 / 6.4 = m
m = 230.16 kg
3. F = ma
Here we have a force = 94 and a mass = 45
Rearrange for acceleration
F/m = a
94 / 45 = a
a = 2.09 m/s^2