Candice Ross has $18,600 to invest today at 10% to pay a debt of $53,068. How many years will it take her to accumulate enough to liquidate the debt? (Round answer to 0 decimal places, e.g. 45.)

Carla Houston has a $25,200 debt that she wishes to repay 4 years from today; she has $17,212 that she intends to invest for the 4 years. What rate of interest will she need to earn annually in order to accumulate enough to pay the debt? (Round answer to 0 decimal places, e.g. 7%.)