Please help solve, show work please :)

Suppose you have a 122-kg wooden crate resting on a wood floor, with coefficient of static friction 0.45 between these wood surfaces. a. What maximum force can you exert horizontally on the crate without moving it? F = N b. If you continue to exert this force once the crate starts to slip, what will its acceleration then be? The coefficient of sliding friction is known to be 0.28 for this situation. a = m / $2