Just having trouble with the last 2 questions

Lab 3: Simple Harmonic Motion (SHM) Lab Objectives: To learn about the concepts of period of oscillation To practice graphing and using a spreadsheet program Set up: The setup for this lab is shown below. -Lo Equation: Time period, T =Total time/No. of oscillations Experiment: Hang at least 5 values of suspended masses to the spring. For each mass, measure the time period. Simulation Web link: https://phet.colorado.edu/en/simulation/masses-and-springs Total suspended mass Total time No. of oscillations Time period, T (kg) (Sec) (Sec) 0.200 15.95 10 1.595 0.225 17.75 10 1.775 0.250 18.61 10 1.861 0.275 19.63 10 1.963 0.300 20.45T 10 2.045 Period of mass oscillating on a spring: Results: 1. What is the average time period of the spring due to periodic motion? Give your answer in second. 2. After finishing your experiment, observe your data for Trial-1, Trial -2, Trial -3, Trial -4, and Trial -5 and then explain in brief how the time period depends on the suspended mass (discuss the relationship in between time period and mass)