The file Silver-Q contains the price in London for an ounce of silver (i n US$) at the end of each quarter from 2004 through 2018.
a. Plot t he data.
b. Develop an exponential trend forecasting equation with quarterly components.
c. Interpret the quarterly compound growth rate.
d. Interpret the first quarter multiplier.
e. What is the fitted value for the last quarter of 2018?
f. What are the forecasts for all four quarters of 2019?
g. Are the forecasts in (f) accurate? Explain.