5/9 or 0.5 recurring 
hope this helps :)
        
                    
             
        
        
        
Range is greater for the 13-14 year olds.
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
Given



Required
Determine the percentage of protein
First, we need to calculate the total:



Percentage of protein is calculated as thus:




 
        
             
        
        
        
2 - b.
3 - a.
I'm not sure about 4. Hope this helps!