Refer to the spreadsheet file named “Everglade Problem 21-9” contained in the Excel files for this chapter on the book’s website. This file contains a formulation of the Everglade problem considered in this chapter. However, there are three errors in this formulation. Use the ideas presented in Sec. 21.4 for debugging a spreadsheet model to find the errors. In particular, try different trial values for which you can predict the correct results, use the toggle to examine all the formulas, and use the auditing toolbar to check precedence and dependence relationships among the various changing cells, data cells, and output cells. Describe the errors found and how you found them.