Most countries use a combination of markets and government intervention to solve the economic problem of how much to produce and consume. can u give me a choice, explain with an example, where, why,...

Most countries use a combination of markets and government intervention to solve the economic problem of how much to produce and consume. can u give me a choice, explain with an example, where, why, and how markets and government interventions work well or poorly in making decisions to maximise society’s net benefit.( what is the key assumption required for market to maximise society’s benefits , and possible market failure)