by using trend analysis. Exhibit 4.

please help me answer this question. please give the most detail, full answer for section b). by using trend analysis. exhibit is in attached file.

Exhibit 4.21 presents selectedoperating data for three retailers for a recent year. Macy’s operates several department storechains selling consumer products such as brand-name clothing, china, cosmetics, and beddingand has a large presence in the bridal and formalwear markets (under store namesMacy’s and Bloomingdale’s). Home Depot sells a wide range of building materials and homeimprovement products, which includes lumber and tools, riding lawn mowers, lighting fixtures,and kitchen cabinets and appliances. Supervalu operates grocery stores under numerousbrands (including Albertsons, Cub Foods, Jewel-Osco, Shaw’s, and Star Market).a. Compute the rate of ROA for each firm. Disaggregate the rate of ROA into profitmargin for ROA and assets turnover components. Assume that the income tax rateis 35 percent for all companies.b. Based on your knowledge of the three retail stores and their respective industry concentrations,describe the likely reasons for the differences in the profit margins forROA and assets turnovers.