please explain the formulas used to find these answers and any manipulations if needed

Veek 4 Problems. Topic 05. 09.13.2019(1) (2) - Protected View - Saved to this PC Jeronim ns Slide Show Review View Help Tell me what you want to do ss you need to edit, it's safer to stay in Protected View Enable Editing Problem 10 a) You borrow $10,000 at an Effective Yield (APY) of 8 percent. If payments are made monthly, what periodic rate are you paying? What is the APR, or nominal rate? What is the effective annual rate for a $5000 loan which will be repaid monthly over the next three years if the APR is 12 percent? c) a) 0.64% b) 7.72% c) 12.68%