Please show how to answer this question and the sub questions with using a financial calculator no excel.

7) If you had a 7 percent, $100,000 30-year fixed-rate mortgage, how long would it take before you had repaid half the loan balance due? If you paid an extra $100 per month to reduce the principal due on the mortgage, how long would it take to repay half the principal due? If you had made the agreed on regular payments on the mortgage, what would be the outstanding principal balance with exactly 7 years remaining