(1 point) An account initially contains an amount Ao After 1 year, simple interest at rate r per year, is applied to the account, resulting in amount Ai Ao+r) What is the effective annual rate of return rA? Your answer should be a function of r alone. Type r as r. An account initially contains an amount Bo. After 2 years, simple interest at rate r per year, is applied to the account, resulting in amount What is the effective annual rate of return rB? Your answer should be a function of r alone. Type r as r. Taylor expansion of the function rB(r) gives Select the true inequalility: For small positive r