A car traveling at 120 km/h strikes a tree. The front of the car compresses and the driver comes to rest after traveling 0.7 m. What was the acerage

A car traveling at 120 km/h strikes a tree. The front of the car compresses and the driver comes to rest after traveling 0.7 m. What was the acerage acceleration of the driver during the collision? Express the answer in terms of g's, where 1.00g = 9.80 m/s2