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You have 2 different savings accounts. For Account​ A, the simple interest earned after 18 months is ​$8.33. For Account​ B, the simple interest earned after 15 months is ​$13.75. If the interest rate is ​3.7% for Account A and ​2.2% for Account​ B, how much is the principal in each​ account? Which account earned you the most interest the first​ month? Explain your answer.