Friendly's Quick Loans, Incorporated, offers you $$6\mathrm{.}75$ today but you must repay $$9\mathrm{.}10$ when you get your paycheck in one week $($or else$).$ a$.$ What is the effective annual return Friendly's earns on this lending business? Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$ b$.$ If you were brave enough to ask, what APR would Friendly's say you were paying? Note: Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$