Visit again the website of the Federal Reserve Bank in St. Louis (research stlouisfed.org) and download the

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Visit again the website of the Federal Reserve Bank in St. Louis (research stlouisfed.org) and download the following data:
a. U.S. real GDP.
b. The exchange rate of the Japanese yen against the U.S. dollar.
c. The 10-year U.S. Treasury constant maturity yield.
d. The U.S. unemployment rate.
For each data set, plot the time series, and write the exact definition, periodicity, and units. Judge whether the underlying stochastic process may be first and second order weakly stationary. Explain your rationale.
Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...
Maturity
Maturity is the date on which the life of a transaction or financial instrument ends, after which it must either be renewed, or it will cease to exist. The term is commonly used for deposits, foreign exchange spot, and forward transactions, interest...
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