$***$PLEASE DISPLAY THIS QUESTION ON EXCEL $--$ show all formulas for the relevant cells! Given that Ella needs to pay tax for her profit at a rate of $20\%$ and tax is paid

by the end of each quarter$1$

$,$ calculate the monthly net cash flows $($Assume

that Ella does not need to pay tax for the proceeds from selling the business.$).$

Assume that Ella can reinvest all after$-$tax profit at a rate of $4\mathrm{.}8\%$ p$.$a$.$ Use

Goal Seek to find revenue increasing rate y$\%$ p$.$a$.$ if Ella requires a holding

period yield rate of $7\mathrm{.}5\%$ p$.$a$.$ for this investment $($from $1$ January $2024$ to $1$

January $2027).$ Label this sheet as $$Part b$.$