1. Implied interest rate and period Aa Aa Consider the case of the following annuities, and the need to compute either their expected rate of return or duration Ryan needed money for some unexpected expenses, so he borrowed $4,165.10 from a friend and agreed to repay the loan in seven equal installments of $800 at the end of each year. The agreement is offering an implied interest rate of Ryan's friend, Adam, has hired a financial planner for advice on retirement. Considering Adam's current expenses and expected future lifestyle changes, the financial planner has stated that once Adam crosses a threshold of $3,392,854 in savings, he will have enough money for retirement. Adam has nothing saved for his retirement yet, so he plans to start depositing $100,000 in a retirement fund at a fixed rate of 8.00% at the end of each year. It will take years for Adam to reach his retirement goal