Question No.1: Problem 5.1 on page 2498250 of the textbook Contemporary Engineering Economics, fourth Edition, Chan S. Park. Question No.2: Briarcliff Stove Company is considering a new product line to supplement its range line. It is anticipated that the new product line will involve cash investment of $700,000 at time 0 and $1.0 million in year 1. After tax cash inflows of $250,000 are expected in year 2, $300,000 in year 3, $350,000 in year 4, and $400,000 each year thereafter through year 10. Though the product line might be viable after year 10, the company prefers to be conservative and end all calculations at that time. a. If the required rate of return is 15 percent, what is the net present value of the project? Is it acceptable? b. What is the project's payback period? c. What is the project's profitability index? d. What would be the case if the required rate of return was 10 percent? Question No.3: Carbide Chemical Company is considering the replacement of two old machines with a new, more efficient machine. It has determined that the relevant after-tax incremental operating cash flows of this replacement proposal are as follows: END OF YEAR 0 2 Cash flows -$404,424 $86,890 $106,474 $91,612 END OF YEAR 5 Cash flows $84,801 $84,801 $75,400 $66,000 $92,400 What is the net present value, payback period, and profitability index? Assume that the required return for this project is 14%. Is the project acceptable