A truck traveling along a level road is carrying a delicate piece of electronic equipment, packaged in a crate in the truck-bed. The mass of the crate plus the electronics is 157 kg. Suddenly, the driver sees a deer running across the road and tries to slow as quickly as possible without causing the crate to slide along the surface of the bed. If the surface of the truck-bed has a coefficient of static friction equal to 0.75, what is the maximum acceleration that the driver can apply in order to prevent the crate from sliding?