Austria is a popular tourist destination during the winter for winter sports and in spring, summer, and autumn for hiking and spas. The file Austria contains quarterly data of nights spent at tourist accommodation establishments from the first quarter of 2014 to the second quarter of 2018.

a. Construct a time-series plot.

b. Develop an exponential trend forecasting equation with quarterly components.

c. Interpret the quarterly compound growth rate. d. Interpret the quarterly multipliers.

e. Write a short summary of your findings.