Someone plz assist with this one!

W 7. Which of the following describes the market structure of monopolistic competition? a. many firms with some control over price, and considerable product differentiation b. many firms with no control over price, producing identical products with no differentiation c. a few firms with some control over price, producing similar products which are close substitutes d. a few firms with no control over price, producing highly differentiated products e. a single firm producing all of the output for the industry 8. Which of the following would not be considered a negative externality? a. loud rap music at 2 a.m. in the apartment next door to you that interrupts your sleep b. traffic congestion c. an Alaskan oil spill d. coronavirus vaccinations e. air pollution 9. The tragedy of the commons: a. occurs whenever goods are privately owned b. arises whenever property rights are well defined c. is usually caused by government intervention into private markets d. is one in which resources to which access is unrestricted will tend to be overused