Firm A and Firm B have debt$-$total asset ratios of $26$ percent and $16$ percent, respectively, and returns on total assets of $7$ percent and $12$ percent, respectively. What is the return on equity for Firm A and Firm B$?($Do not round intermediate calculations and enter your answers as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$ please explain step by step and explain the how and why the use of several finanical ratios are being used without using an excel sheet.