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n 6.7: Applications of the Definite Integral to Business and Economics The following questions involve the present and future values of income streams. (A) Suppose the rate of money flow was R() = 4000e"over 7 =9 years. Set up the definite integral that would compute the total income stream and then use your calculator to approximate the total income stream. Round your answer to the nearest $0.01. (B) A company expects its rate of annual income during the next five years to be R() = 24,000r. Set up a definite integral that would compute the present value of this income stream over a five-year period, assuming an interest rate of 4% compounded continuously. Then use your calculator to approximate this present value. Round your answer to the nearest $0.01. (C) A company expects its rate of annual income stream for the next 12 years to be R() = 7000e- Set up a definite integral that would compute the future value of this income stream over a 12-year period assuming an interest rate of 9% compounded continuously. Then use your calculator to approximate the future value. Round your answer to the nearest $0.01