Fritz makes custom chocolate portraits of dogs and sells them online. He is trying to gure out how many assistants to hire to help in his business. If he hires one worker, they can produce 20 dog portraits per week. With two workers, they produce 28 portraits per week. With three workers, they produce 34 portraits per week. With four workers, they produce 39 collars per week. Fritz charges $10 per portrait. If the market wage for chocolatier artists is $70 per week, Fritz will hire D worker(s). If a minimum wage law is imposed that requires payment of at least $90 per week, Fritz will hire |:| worker(s). Finally, if demand for dog chocolate portraits goes up for Mother's Day so that Fritz can charge $16 per portrait, then - assuming the minimum wage is still in place - Fritz will hire |:| worker(s)