1. The problem statement, all variables and given/known data 2. Relevant equations n/a 3. The attempt at a solution I don't know how to start part A and part B depends on part A. How does one calculate a lower mass limit? Is it the lower limit of an integral? I also don't understand how there can be two periods (one at 0.714 seconds and the other at 3.89 days). Do I use simple harmonic motion? My teacher never covered anything this complicated before. Thank you for your time.