how to answer this question about experiment newton second law

1. From the data, plot graph for: a. Total force as a function of acceleration for non-friction surface. b. Total force as a function of acceleration for friction surface. 2. Find the value of gradients (slopes) of the graphs. 3. Find the coefficient of kinetic friction, uk between the small crate and the wood surface from this simulation. 4. Using Newton's Second Law of Motion, calculate the coefficient of kinetic friction, ux between the small crate and the wood surface. Compare the calculated value with the value obtained from this experiment