1. Bob's lawn-mowing service is a profit-maximizing, perfectly competitive firm. Bob mows lawns for $27 each. His total cost each day is $280, of which $30 is fixed. He mows 10 lawns per day.What can you say about Bob's short-run decision regarding whether to shut down and his long-run decision regarding whether to exit the industry? 2. In real life, how close to perfect competition is the lawn-mowing and landscaping business? Are there many firms? Do they have identical costs and products? Are there barriers to starting your own landscaping business? Are there barriers to exiting the industry?