need help with both please thank u much

Consider a zero-coupon bond with $100 face value and 15 years to maturity. The price will this bond trade if the YTM is 5.1% is closest to: A. $56.9 B. $75.87 C. $66.39 D. $47.42 Sara wants to have $530,000 in her savings account when she retires. How much must she put in the account now, if the account pays a fixed interest rate of 9%, to ensure that she has $530,000 in 18 years time? A. $119,492 B. $202,243 C. $157,300 D. $112,357