Answer:
b
Explanation:
2 attempts are made and the best time is used.
scoring: Take the best time of the two trails to the nearest 1/10th second. Below is a table showing the recommended ranges in seconds for this test based on age groups
 
        
                    
             
        
        
        
I can't find 50 sorry for that.
Hope it helps..
 
        
        
        
7 days a week is recommended for any age to be hygienic but that's should you could never shower i guess i mean it's your choice but don't do that 6-7 is healthy or "normal"