i need help but i need thag math on how to get all the answers with work done so i could understand it

Return on Investment (ROI) \& Residual Income P 10 - A The following reflects operating data from three independent companies. Required: 1) Calculate the following for each company: margin, turnover and return on investment. 2) Calculate the residual income for each company. 3) Each company has the opportunity to invest in a project that will yield 7.5%. a) If performance is measured by ROI, which of the companies will accept/reject the opportunity? (One word answer for each.) b) If performance is measured by residual income, which of the companies will accept/reject the opportunity? (One word answer for each.)