Problem 5.03 Finding the Required Interest Rate) parents will retire in 25 years. They currently have $300,000 saved, and they think they will Your need $1,200,000 at retirement. What annual interest rate must they earn to reach their goal, assuming they don't save any additional funds? Round your answer t o two decimal places. Problem 5.04 (Time for a Lump Sum to Double) If you deposit money today in an account that pays 11% annual interest, how long will it take to double your money? Round your answer to two decimal places years