Louie borrowed $2,000 from Phil. Under this agreement, Louie would repay with $1,200 at t = 1 and $1,700 at t = 4 where time is given in years. Louie successfully made the payment in full at t = 1,...

Extracted text: Louie borrowed $2,000 from Phil. Under this agreement, Louie would repay with $1,200 at t = 1 and $1,700 at t = 4 where time is given in years. Louie successfully made the payment in full at t = 1, but he faced some financial difficulty and was only able to pay 60% of what he owed at the time of the second payment. What was the annual interest rate for the original loan? What is Phil's annual yield for this four-year period? %D