4. Your group runs the only bank in the economy, Humongous Bank. The people in your economy have $20 million in money and they deposit all of it in Humongous Bank: a. Explain what a T-account is. b. Humongous Bank decides on a policy of holding 100% reserves. Draw a T-account for the bank. c. Humongous Bank is required to hold 5% of its existing $20 million as reserves and to loan out the rest. Draw a T account for the bank after it has made its first round of loans. d. Now consider that Humongous Bank is part of a multibank system. How much money will supply increase with that original $19 million loan