ollowing are selected financial statement data from $3$M Company.

$ millionsTotal AssetsNet IncomeSalesFY$1$$$62,523$$$6,541$$$45,240$FY$266,2827,83445,308$FY$365,9018,50149,747$FY$465,0378,30748,171$

Required

a$.$ Compute the return on assets $($ROA$),$ profit margin $($PM$),$ and asset turnover $($AT$)$ for each of the three years F$2,$ F$3,$ and F$4.$ Round any intermediate calculations to the nearest whole dollar amount.

NumeratorDenominatorResultReturn on assets $($ROA$)$FY$4$FY$3$FY$2$Profit margin $($PM$)$FY$4$FY$3$FY$2$Asset turnover $($AT$)$FY$4$FY$3$FY$2$

b$.$ What factor mainly responsible for the change in $3$M$$s ROA from FY$2$ to FY$3?$ Is it profit margin or asset turnover or both? Answer $19$Asset turnoverBothProfit margin

c$.$ What factor is $**$mainly$*$ responsible for the change in $3$M$$s ROA from FY$3$ to FY$4?$ Is it profit margin or asset turnover or both? Answer $20$Asset turnoverBothProfit margin