Enron Financial, is currently offering $3.20 for $4.20 or I knock on your door. This implies that you have to repay $4.20 when you get your stipend from your parents in a week, and only receive $3.20 today.

a.	What APR would Enron Financial say you were paying? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)
b.	Compute the the effective annual return that Enron Financial earns on this type of loan? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)