PART A: ABC English course provided the following vertical analysis of its income statements for 2018 and 2019 Percentage of Revenues 2018 2019 Revenues 100% 100% Salaries expense 40 45 Rentals expense 20 Book and supplies 10 Advertising 10 Operating Income 20 Income Tax 8 Net Income 12 205523 10 15 Required a. Based on the above information, prepare the firm's income statements for 2018 and 2019 b. Provide a horizontal analysis of the changes in each item in the income statement. c. Based on your analysis, comment about the expected future performance of ABC English Course.