In: Math
A company has sales of automobiles in the past three years as given in the table below. Using trend and seasonal components, predict the sales for each quarter of year 4.
| 
 Year  | 
 Quarter  | 
 Sales  | 
| 
 1  | 
 1  | 
 71  | 
| 
 2  | 
 49  | 
|
| 
 3  | 
 58  | 
|
| 
 4  | 
 78  | 
|
| 
 2  | 
 1  | 
 68  | 
| 
 2  | 
 41  | 
|
| 
 3  | 
 60  | 
|
| 
 4  | 
 81  | 
|
| 
 3  | 
 1  | 
 62  | 
| 
 2  | 
 51  | 
|
| 
 3  | 
 53  | 
|
| 
 4  | 
 72  |