pls help with this question.

What is a free market? In what ways does a free market economy differ from a centrally-planned economy? Provide a discussion of the process of price formation and resource allocation under these two economic systems. Please also provide a discussion of the efficiency properties of the economic outcomes under these two economic systems. (Hint: You would need to define a notion of Pareto efficiency and explain whether a Pareto efficient outcome is achieved in a free market economy and in a centrally-planned economy)