Conduct a vertical analysis by expressing each line as a percentage of total revenues. Note: Round percentage values to 1 decimal place. Complete this question by entering your answers in the tabs below. Excluding income tax and other operating costs, did Insilgnia earn more gross profit per dollar of ravenue in 2018 compared 2017? Did frotsit earn more gross profit per dollat of revenue in 2018 ? The average price of a gallon of gas in 2018 increased $0.30 (12.4 percent) from $2.42 in 2017 to $2.72 in 2018 . Required: 1. Conduct a horizontal analy sis by calculating the year-over-year changes in each line item, expressed in dollars and in percentages for the income statement of Insighia Corporation for the year ended December 31, 2018 (amounts in billions). 2-0. Conduct a vertical analysis by expressing each line as a percentage of total revenues. 2-b. Excluding income tax and other operating costs, did Insignia earn more gross profit per dollar of revenue in 2018 compared to 2017? Complete this question by entering your answers in the tabs below. Conduct a horizontal analysis by calculating the year-over-year changes in each line item, expressed in dollars and in percentages for the income statement of Insignia corporation for the year ended December 31,2018 (amounts in billions). Note: Decreases should be indicated by a minus sign. Enter your answers in billions (i.e., 10,000,000,000 should be entered as (0). Round percentage values to 1 decimal place