Quarter Guests Quarter Guests (in thousands) (in thousands) Winter Year 1 80 Summer Year 2 120 Spring Year 1 100 Fall Year 2 50 Summer Year 1 150 Winter Year 3 90 Fall Year 1 70 Spring Year 3 140 Winter Year 2 60 Summer Year 3 200 Spring Year 2 80 Fall Year 3 100 Compute seasonality indices using all of the data.