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Suppose you are in a hurry to get your income tax refund. If you mail your tax return, you will receive you refund in 3 weeks . If you find the return electronically through a tax service, you can get the estimated refund tomorrow. The service subtracts a $50 fee and pays you the remaining expected refund. The actual refund is then mailed to the preparation service. Assume you expect to get a refund of $978. 1. What is the APR with the weekly compounding? 2. What is the EAR? 3. How large does the refund have to be for the APR to be 15%