Complete the table below by inserting the applicable letter in each box-"I" for increase, "D" for decrease, "N" for no effect, and "CD" for cannot determine-to describe the effect of each isolated event on all of the ratios in the column headings:

Profit Asset Margin TurnoverAssets Return on Event (a) (b) (c) Aging assets are not being replaced. Operating expenses have been cut due to efficiencies The company has increased prices of products with no reduction in the number of products sold. Depreciation method was changed from straight-line to diminishing balance; assets are quite new. The government has raised the income tax rate. A major upgrade of assets has occurred. (d) (e) (f)