Answer:
C. Supervising the game to make sure teams are playing fairly
 
        
             
        
        
        
F-free = m*g - F_air = m*a
F_air = 1.2 * m
a= (105 kg * 9.8 m.s^2 - 5*105) / 105 kg
a = 9.3 m/s
Hope this helps
        
             
        
        
        
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