Consider the following tree diagram: 
Which of the following nodes are interior nodes?
Definitions:
Foreign Currency
The currency of another country that is required to conduct foreign trade and business transactions.
Futures Contract
A legal document that obligates parties to buy or sell a commodity at a price determined in advance, on a specified future date.
Assembly
The process of putting together various components or parts to form a finished product.
Speculation Strategy
An investment strategy aimed at making profits from market value changes, often involving high risk and short-term commitments.
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