The second question:

Distance to each construction site-distance to each construction site

1:-2.083

2:-6.057

3:2.225

4: 1.838

5:3.97 1

6:0.708

A is closer to 12 and farther away from 3456. Because B3+B4+B5+B6 >: 30, a part of 3456 is allocated to A for contracting. As can be seen from the above table, the distance from A to Station 6 -B to Station 6 in 3456 is the smallest, so there are

A: 4 6 0 0 0 2

B: 0 0 6 7 8 9