Mary applies a force of 72 n to push a box with an

Question

Compute all parts of following problem:

Problem: Mary applies a force of 72 N to push a box with an acceleration of 0.44 m/s². When she increases the pushing force to 80 N, the box's acceleration changes to 0.65 m/s2, there is a constant friction force present between the floor and the box.

Part I: What is the mass of the box?

Part II: What is the coefficient of kinetic friction between the floor and the box?

I need help to determine the coefficient of kinetic friction between the floor and the box.