graph and table below to answer three questions about a monopolist. A graph titled Monopoly Fish Market shows two decreasing lines on a coordinate plane.The horizontal axis is labeled quantity in pounds of fish per hour, and it ranges from 0 to 10 in increments of 1. The vertical axis is labeled price in dollars per pound, and it ranges from negative 1 dollar to 14 dollars in increments of 1 dollar. The first line is labeled D. It starts from (1, 13), dips linearly through (3, 11), (7, 7), and finally ends at (9, 5). The second dashed line is labeled M R. It starts from (1, 13), dips linearly through (2, 11), (5, 5), intersects the positive horizontal axis at (7.5, 0), and goes down to end at (8, negative 1). Quantity Price Total Revenue Marginal Revenue 1 $13 $13 2 12 24 $11 3 11 33 9 4 10 40 7 5 9 45 5 6 8 48 3 7 7 49 1 8 6 48 1 Instructions: Enter your responses as a whole number. At what output rate is total revenue maximized? pounds of fish What is marginal revenue at that output