Attendance at Los Angeles's newest Disneylike attraction, Vacation World, has been as follows-
Quarter Guest in Thousands Quarter Guest in Thousands
Winter 07 73 Summer 08 124
Spring 07 104 Fall 08 52
Summer 07 168 Winter 09 89
Fall 07 74 Spring 09 146
Winter 08 65 Summer 09 205
Spring 08 82 Fall 09 98
Compute seasonal indices using all of the data.
a) If vacation world forecasted to get 400 guests (in thousands) in 2010, what would have been their winter '10 forecast?