The table below presents the industry output for three different industries. Firm Industry 1 Output Industry 2 Output Industry 3 Output Firm A 500 40 100 Firm B 0 40 100 Firm C 0 40 100 Firm D 0 40 0 All other firms 0 800 0 Instructions: Round your answers to two decimal places. a. Calculate the four-firm concentration ratio for Industry 2. Industry 2: % b. Based on the information provided, what market structure best characterizes Industry 2? Industry 2: (Cli