data follows for the construction division of D.Jack Inc; year 1 year 2sales $148,500,000 $162,250,000operating income 8,910,000 8,112,000average operating assets 337,500,000 405,625,000round all answer to two decimal places.required;
1-compute the margin and turnover ratios for each year
2-compute the ROI for the construction Division for each year