Travel times

This task requires calculating travel times on a network map.
Network map of towns
 
The map above shows the time it takes (in hours) to travel between each town.
For example, it takes 5 hours to go from Westown to Abra.

Question 2Change answer

a)  i)   How long does it take to travel from Abra to Po? hours

Question 2Change answer

     ii)  How long does it take to travel from Cadab to Cuss and then to Eastville?  hours

Question 2Change answer

b)  Taking the quickest way, how long does it take to go from Ra to Eastville?   hours