Use the following to answer question: 
-(Figure: A Tariff on Oranges in South Africa) Use Figure: A Tariff on Oranges in South Africa.When the government imposes a tariff on imported oranges,the price of oranges in South Africa rises from PW to PT and there's a net _____ to total surplus of _____.
Definitions:
Risk-Free Rate
The return on investment with no loss of principal, often represented by the yield on government securities.
Beta
An indicator that determines the systematic risk or volatility of a security or a portfolio relative to the overall market.
Portfolio Beta
A measure of the volatility, or systematic risk, of a portfolio in comparison to the market as a whole.
Beta
A measure of a stock's volatility in relation to the overall market; used in the CAPM to calculate a stock's expected return.
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