Assume the average cost of computer equipment fell 23.9 percent between 2016 and 2017. Let's see whether these changes are reflected in the income statement of Computer Tycoon Inc. for the year ended December 31, 2017. Required: 1-a. Conduct a horizontal analysis by calculating the year-over-year changes in each line item, expressed in dollars and in percentages. (Round your "Percentage" to 1 decimal place. Any decrease in amounts should be indicated with minus sign) 1-b. Not available in Connect. 2-a. Conduct a vertical analysis by expressing each line as a percentage of total revenues. (Round your answers to 1 decimal place. Input all amounts as positive values.)