1

(0, -10, 0), 0,0,0,0  1,0,0,0 
-1
0 0 
1 3
4
0 -20 0
0 0
0 -20 20
0 .1
2 -25 0
.1 0

0 -20 0
.1 0
-2 -25 0
0 0
0 -20 20
.1 .1

-2 -25 0
0 0
2 -25 0
.1 0
0 -20 20
.1 .05

2 -25 0
.1 0
-2 -25 0
0 0
0 -20 0
.05 .1
0
0