Sales department meeting was held at 2:00 pm.
At most two meetings were held before Sales department.
No break was there before Sales department meeting.
| Case 1 | Case 2 | Case 3 | 
| Time | Department | Time | Department | Time | Department | 
| 2:00  - 3:00 | Sales | 1:00-   2:00 |  | 12:00-1:00 |  | 
|  |  | 2:00-3:00 | Sales | 1:00-   2:00 |  | 
|  |  |  |  | 2:00-3:00 | Sales | 
|  |  |  |  |  |  | 
|  |  |  |  |  |  | 
|  |  |  |  |  |  | 
|  |  |  |  |  |  | 
|  |  |  |  |  |  | 
Two meetings were scheduled between Sales and Marketing.
Marketing department meeting was scheduled after Quality department.
Quality department meeting was held after 4:00 pm.
At most three meetings were scheduled after Quality department meeting.
Thus, Case 1 and Case 2 get cancelled.
| Case 3 | Case 3a |  | 
| Time | Department | Time | Department | 
| 12:00-1:00 |  | 12:00-1:00 |  | 
| 1:00-2:00 |  | 1:00-2:00 |  | 
| 2:00-3:00 | Sales | 2:00-3:00 | Sales | 
| 3:30-4:30 |  | 3:00-4:00 |  | 
| 4:30-5:30 | Quality | 4:30-5:30 | Quality | 
| 5:30-6:30 | Marketing | 5:30-6:30 | Marketing | 
|  |  |  |  | 
|  |  |  |  | 
Only one meeting was scheduled between Quality and HR.
HR department meeting was scheduled before Production department meeting.
There was no break immediately before Production and Operations department meeting.
| Case 3 | Case 3a |  | 
| Time | Department | Time | Department | 
| 12:00-1:00 |  | 12:00-1:00 |  | 
| 1:00-2:00 |  | 1:00-2:00 |  | 
| 2:00-3:00 | Sales | 2:00-3:00 | Sales | 
| 3:30-4:30 |  | 3:00-4:00 |  | 
| 4:30-5:30 | Quality | 4:30-5:30 | Quality | 
| 5:30-6:30 | Marketing | 5:30-6:30 | Marketing | 
| 7:00-8:00 | HR | 7:00-8:00 | HR | 
| 8:00-9:00 | Production | 8:00-9:00 | Production | 
Three meeting were scheduled between Production and Operation departments.
There was no break immediately before Production and Operations department meeting.
Thus, Case 3 gets cancelled.
| Case 3a |  | 
| Time | Department | 
| 12:00-1:00 |  | 
| 1:00-2:00 |  | 
| 2:00-3:00 | Sales | 
| 3:00-4:00 | Operation | 
| 4:30-5:30 | Quality | 
| 5:30-6:30 | Marketing | 
| 7:00-8:00 | HR | 
| 8:00-9:00 | Production | 
Finance department meeting is after Technology department meeting.
| Time | Department | 
| 12:00-1:00 | Technology | 
| 1:00-2:00 | Finance | 
| 2:00-3:00 | Sales | 
| 3:00-4:00 | Operation | 
| 4:30-5:30 | Quality | 
| 5:30-6:30 | Marketing | 
| 7:00-8:00 | HR | 
| 8:00-9:00 | Production | 
This is the final arrangement.
Four meetings were scheduled after Operation Department meeting.