Who answers the questions of "What", "How" and "For whom" to produce in case of a mixed economy?

Both 1 and 2

The correct answer is Option 4: Both 1 and 2

Mixed economy is a blend of private and government sectors. This means both the private sector and the government play roles in determining these aspects. The private sector makes decisions based on market forces and consumer demand, while the government intervenes to address market failures and provide public goods and services.

Thus, the 3 central problems of the economy are answered by both the entities.