Insert a picture on the question bc there is no image
        
             
        
        
        
Here is a list of the odd number paired
1+3, 1+5, !+7, and !+9  (there are 4 unique sums - 4, 6,8 and 10)
3+5, 3+7, 3+9  (notice I did not pair 3 with 1 and the the only new sum is 12)
5+7, 5+9  (the only new sum is 14)
7+9  (16 is a new sum)
The sums (no repeats) are 4,6,8,10,12,14 and 16 for a total of seven numbers.
        
             
        
        
        
Answer: 8 minimum work stations is what would be needed. 
Step-by-step explanation:
The cycle time is computed as the operating time daily divided by the scheduled output. 
It is important to note that the daily capacity of the operation layout is the operating time divided by the cycle time. 
Therefore, 
If you need to produce 30units/hour.
The average cycle time is as follow:
The average cycle time is the average time between the completions of units. 
60/30= 2 average cycle time
=16/2
=8
8 work stations is the minimum number that would be needed.
It is important to know that in an assembly line balancing, the minimum number of work station is the ratio of the sum of all tasks time to the cycle time.