What is the effective, compound rate of interest you earn if you enter into a repurchase agreement in which you buy a Tbill for $76,789 and agree to sell it after a month (30 days) for $77,345? What is the compound rate of interest you earn if you enter into a repurchase agreement if you sell a Tbill for $76,789 and repurchase it after a month (30 days) for $77,345?