Explanation:
Formula depicting relation between total flux and total charge Q is as follows. 
               
    (Gauss's Law)
Putting the given values into the above formula as follows.
             Q = 
 
                 = 
                 = 
                 = -8.4 nC
Therefore, when the unknown charge is q  then,
          -14.0 nC + 33.0 nC + q = -8.4 nC
                q = -27.4 nC
Thus, we can conclude that charge on the third object is -27.4 nC.
 
        
             
        
        
        
5 seconds is a poor time to ask about, because the speed abruptly changes at exactly 5 seconds.
Up until that time, the speed has been 1 m/s. And then, at exactly 5 seconds, it becomes zero.
_________
It's also a poor question because speed is calculated from the distance covered, but the graph shows displacement, not distance. You can't really tell the distance covered from a displacement graph.
For example, if an object happens to be moving in a circle around the place where it started, then the total distance covered keeps increasing, but its displacement is constant.
        
                    
             
        
        
        
Answer:
I believe the answer is esophagus