Use the table for the question(s)below.
Consider the following returns: 
-Calculate the variance on a portfolio that is made up of equal investments in Stock Y and Stock Z stock.
Definitions:
International Trade
The exchange of goods, services, and capital between countries and territories.
Autarky
Autarky is an economic policy or situation in which a nation is self-sufficient and does not engage in international trade or relies minimally on external resources.
Producer Surplus
the difference between what producers are willing to accept for a good versus what they actually receive.
World Price
The global market price of a good or service, influenced by international supply and demand.
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