first of all you listen to the lesson on networks as obviously this is based on course work
and then we read the book
then we make 6 points and join the figures as stated
point 1 is joined to 2, 3 and 4 etc
and then we write on the lines that you have made, the times....
so 1-2 has 3 written on it
1-3 has 4 written on it
just as you were taught when you werent listening
I think - I could be wrong ....
This is part of a shortest-time problem isnt it?