How does the government regulate the activities of the private sector in a mixed economy?

They do it by following methods:

a. Rules, Regulations, and Policies that govern the working of private sectors.

b. Having government audit teams and ministry of commerce and industry to look after the working of both public and private entities

c. Imposing various restrictions and providing subsidies and tax benefits are other means

d. Controlling financial systems of the economy provides a stronghold on private enterprises