The government of Eastlandia uses measures of monetary aggregates similar to those used by the United States, and the central bank of Eastlandia imposes a required reserve ratio of 10%. Given the following information, answer the questions below. [8] Bank deposits at the central bank - $200 million Currency held by public = $150 million Currency in bank vaults = $100 million Checkable bank deposits = $500 million Traveler's checks = $10 million a. What is MI? [2p] b. What is the monetary base? (2p] c. Are the commercial banks holding excess reserves? (2p) d. Can the commercial banks increase checkable bank deposits? If yes, by how much can checkable bank deposits increase?