Please show work and formulas:

A: You deposit $100 for the next 15 years earning 10% per year. What would your balance be at the end of the 15 Years?

B: You borrow $100,000 for 18 years at an annual rate of 7%. What would be your fixed QUARTERLY loan payment?

C: For the loan in #5 above, what percent of your first payment would apply to the principal?