Read the article and choose the best answer to each question . A good idea or a bad product? Howard Stapleton noticed that in his town, large groups of young people often met outside of shops. They didn’t often go into the shops to buy things, but they made it difficult for customers to enter the shops. Stapleton knew this was bad for business. He wanted to help. Then he had an idea. He made a machine that makes a very high noise. Young people can hear the noise, but older people can’t hear it. The noise doesn’t hurt young people, but it makes them want to leave the area. He calls his machine the Mosquito. (A mosquito is a small insect that makes an annoying sound.) The product is a success. He has sold 3,500 units in a year. The cost is £500 each. In some areas, the police buy the Mosquito to stop young people from meeting in large groups. This helps businesses, because customers are now able to enter their shops easily. But not everyone is happy. Shami Chakrabarti says that it is not fair to young people. She has complained to the police and some businesses that have bought the Mosquito. As a result of her complaints, sales of the Mosquito have decreased by 50 percent. Stapleton wants to negotiate with Chakrabarti, but she won’t talk to him. She says: ‘This is a bad product.’ Stapleton is thinking about reducing the price to increase sales.