What is the effective, compound rate of interest you earn if you enter into a repurchase agreement in which you buy a treasury bill for $$86,789$ and agree to sell it after one month $(30$ Days$)$ for $$87,345?$ What is the compound rate of interest you pay if you sell a treasury bill for $$86,789$ and repurchase it aft$3$er $30$ days for $$87,345?$