What role do government agencies play in a mixed market economy?

They run shipping companies and other sources of distribution,

They own farmas, factories, and other sources of production

They regulate some aspects of production and distribution.

They employ most of the workers in the economic system

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They regulate some aspects of production and distribution because in a mixed market economy, the government and the corporations both have power to an extent. For example the US is a mixed markets and the government regulates some aspects of companies but the companies themselves mainly have control