= 1 1- 15+ 13-3-6-8+5+ 16 = -4+ 13-3-6-8+5+ 16 = 9-3-6-8+5+ 16

= 6-6-8+5+ 16 = 0-8+5+ 16 = -8+5+ 16 = -3+ 16 = 13

1) finally in the east 13 km.

2) farthest from the starting point at last.

3)|-9|+|+ 17|+|+3|+|- 15|+|+ 13|+|-3|+|-6|+|-8|+|+5|+|+ 16|

= 9+ 17+3+ 15+ 13+3+6+8+5+ 16 = 95

Fuel consumption = 95 x 0.4 = 38 liters