In the diagram below,which highlighted element is an f block element? 
Definitions:
Real Income
The income of an individual or group after adjusting for inflation, reflecting the actual purchasing power of the income.
Government Expenditures
Federal, state, and local government outlays for goods and services, including transfer payments.
Rational Expectations
The economic theory that when making decisions, individuals take into account all available information, including their understanding and predictions of the future.
Economic Well-being
The degree of prosperity, well-being, luxury items, and essential needs accessible to an individual, community, or society.
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