Please show excel formulas used

Input Area: \begin{tabular}{lr} Debt-equity ratio & 1.5 \\ WACC & 11% \\ Cost of debt & 7% \\ Tax rate & 35% \\ Debt-equity ratio & 2.00 \\ Debt-equity ratio & 1.00 \\ Debt-equity ratio & 0.00 \\ \hline \end{tabular} Output Area: a. RE b. RU c. REI RE RE III = WACC \begin{tabular}{|l|} \hline \\ \hline \\ \hline \end{tabular}