The answer might be C ? hope it's right
        
             
        
        
        
Answer:
 the acceleration of harry is equal to 66.126 m/s²
Explanation:
given,
harry is 35 m behind Draco
speed of Draco = 40 m/s
original speed of harry = 50 m/s
acceleration = ?
time taken by the Draco 
     t = 
 
      t = 1.875 s
distance covered by Harry
   d = 35 + 175 = 210 m
to calculate the acceleration of harry 


a × 3.516 × 0.5 = 116.25
a = 66.126 m/s²
hence, the acceleration of harry is equal to 66.126 m/s²