1. find that the price might include some of those features and some things might add to the overall price.
2. could choose a 36 month and a 48 month option for the two financing options that you need to build an amortization schedule.
The Leasing option would be good to save for the discussion about alternatives that you might consider. There, you would have a chance to explain your reasons for considering leasing instead of buying.
3. Use a standard rate that balances earn like 0.25%, 0.50%, 1.0%, 1.25%, or 1.50%.
4. You are required to use Excel to calculate the values in the Amortization Schedules. The Future Value Annuity (Ordinary) would be a good formula to use if you are making payments at the end of a time frame to an account. This is called a Sinking Fund.