The data file Exchange Rate shows an index of the value of the U.S. dollar against trading

Question:

The data file shows an index of the value of the U.S. dollar against trading partners’ currencies over 12 consecutive months.
a. Construct a time-series plot of this data using a vertical axis that ranges from 92 to 106.
b. Construct a time-series plot of this data using a vertical axis that ranges from 75 to 120.
c. Comment on these two time-series plots.
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...