Please answer a and b and provide further explanations. Thanks

TIF 11-2 Real-world company product costs Product pricing and product costs vary significantly depending on company and industry. Three such companies, their industries, and an associated product are: Company Industry Product Delta Air Lines (DAL) Air travel Airline tickets Amazon (AMZN) Internet retailing Various consumer products HP Inc. (HPA) Computer manufacturer Computers In teams of three, assign each person in your group to one of the companies listed. Go to the company's website and determine the following: a. A product or service) description. b. Based on your responses to part (a) along with the description of the company's business, identify the potential costs that are required to sell the product selected in part (a), and categorize them as fixed or variable