4. The following table presents quarterly seasonal indexes for the number of new automobiles sold by a car dealership in London Ontario.

Spring	Summer	Fall	Winter
1.15	0.80	1.10	0.95

1. Comment on the seasonal indexes in relation to automobile sales. (3 marks)

2. From the original historical data (2002 2006) a trend line of TR_t = 250 + 6t, where t = 1 to 20, was calculated. Assuming a multiplicative seasonal model forecast the number of new automobiles expected to be purchased in the year 2007, by quarter. (5 marks)