6 b Over the past year Meredith and Smunt Manufacturing had annual sales of 10,000 portable water pumps. The average quarterly sales for the past 5 years have averaged: spring 4,000, summer 3,000, fall 2,000 and winter 1,000. Compute the quarterly index. O a. the seasonal index for each quarter is: spring = 1.5; "summer=1 3, fall=0.8; winter = 0.4 O b. the seasonal index for each quarter is: spring = 1.6, summer=1.2; fall=1.8, winter = 1.4 O c. the seasonal index for each quarter is: spring = 1.6, summer=1.2; fall=0.8, winter = 0.4 Next pa to search O va hp