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THIS IS A FINANCIAL MANAGEMENT QUESTION

Professor deCarufel is planning to take a three-year leave of absence, with no pay, seven years from now to carry out a research project. He will need $60,000 at the beginning of each of the three years for living expenses. How much should he deposit at the end of each year for the next seven years in a savings account at 10% to finance his living expenses during his 3-year leave