In the tab Problem $4,$ you will find numerical assumptions for forecasting the financials of The Plumber Slow Co$.$ from Years $1$ through $5.$ In addition to these assumptions, some numbers have been provided for Year $0,$ along with the following facts. $-$ The company has a strict policy of not maintaining any excess cash balances in any year. Therefore, all cash is required cash. $-$ The company does not have any preferred stock. $-$ During years $1$ through $5,$ the company does not plan to raise any equity capital by issuing new common stock. No repurchases of common stock are planned. $-$ Yearly interest expense is calculated on the debt balance at the beginning of the year $($i$.$e$.,$ ending debt balance of the last year$).-$ The interest rate on debt offered by lenders each year depends on the interest coverage ratio $($which is defined as $=$ EBIT$/$interest expense at the end of the previous year according to the following table