The purchasing power P (in dollars) of an annual amount of A dollars after t years of 5% inflation decays according to the following formula P=Ae^-0.05t A. How long will it be before a pension of $80,000 per year has a purchasing power of $20,000? (Round your answer to the nearest dollar). B. How much pension A would be needed so that the purchasing power P is $40,000 after 11 years? (Round to the nearest dollar).

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