Answer:
   3, 4, 2
Explanation:
I can't see the final ones. 
 
        
             
        
        
        
Answer:
David 
Explanation:
Because he is not on the ride with Ben and Justine 
 
        
                    
             
        
        
        
Answer:
1160 ohm
Explanation:
We are given that
R'=580 ohm 
Current=3 I
We have to find the resistance of the circuit.
Let R be the resistance of circuit.
In parallel 

Using the formula 


In parallel combination,Potential difference across each resistance remains same.

Using the formula 




 
        
             
        
        
        
A is the answer for this question