(Quiz week 13, nov 24th) Consider the eletric network described bellow:

 

Then, bellow we have the correspondent network, showing the capacity of energy transportation and how de the network is directed from tower to tower. Suppose we have a demand to transport energy from Tower 1 to Tower 4, in order to maintain a city.

Given the demand problem, assess the statements below:

1. The figure below show a valid flow for the network:
   

   

   
    
2. Considering the flow showed at I, then II shows the correspondent residual graph:
   
   
   .
3. $f(u,v) = f(v,u)$ for all $u$, $v$ $\in$ $V$

1. Given the statements, which of them are true:
   1. I and II.
   2. I and III.
   3. II and III.
   4. I, II and III.
   5. None of the above.
   ção.