The arrivals data set comprises quarterly international arrivals (in thousands) to Australia from Japan, New Zealand, UK and the US. Use autoplot() , ggseasonplot() and ggsubseriesplot() to compare...

The arrivals data set comprises quarterly international arrivals (in thousands) to Australia from Japan, New Zealand, UK and the US.

Use autoplot() , ggseasonplot() and ggsubseriesplot() to compare the dierences between the arrivals from these four countries.

Can you identify any unusual observations?