please answer these questions step by step:

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Chapter 5: Applying Excel: Exercise (Part 2 of 2) (Algo) 2. Change all of the numbers in the data area of your worksheet so that it looks like this: (c) What is the degree of operating leverage? (Round your answer to 2 cecimal places.) 3. Using the degree of operating leverage and without changing anything in your worksheet, calculate the percentage change in net operating income if unit sales increase by 20%. 4. Confirm your calculations in Requirement 3 above by increasing the unit sales in your worksheet by 20% so that the Data area looks like this: (a) What is net operating income? (Negative amount should be indicated by a minus sign.) (b) By what percentage did the net operating income increase