Income statements for Adams Company for Year 3 and Year 4 follow: ADAMS COMPANY Income Statements Year 4 Year 3 Sales $201,200 $181,200 Cost of goods sold 142,000 120,000 Selling expenses 21,400 19,400 Administrative expenses 12,200 14,200 Interest expense 3,300 5,300 Total expenses $178,900 $158,900 Income before taxes Income taxes expense Net income 22,300 6,100 22,300 4,000 $ 16,200 $ 18,300 Required a. Perform a horizontal analysis, showing the percentage change in each income statement component between Year 3 and Year 4. b. Perform a vertical analysis, showing each income statement component as a percentage of sales for each year.