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3. Money and Banking: Tracy deposits $2,000 in her checking account at her local bank. The bank maintains a reserve ratio of 3.7%: a. If every time the bank makes a loan, the loan results in a new checking deposit in a different bank equal to the amount of the loan, by how much could the total money supply in the economy expand in response to Tracy's initial cash deposit of $2,000? (3 points) b. By how much would total money supply expand if Tracy holds $220.00 of the $2,000 in cash? (3 points)