III. I
u
3
= h−7u
5
+ 4u
4
+ · · · + 23b − 18, −32u
5
+ 15u
4
+ · · · + 23a − 10, u
6
+
6u
4
− u
3
+ 7u
2
+ 3u + 1i
(i) Arc colorings
a
3
=
0
u
a
10
=
1
0
a
1
=
1
u
2
a
2
=
u
u
3
+ u
a
6
=
1.39130u
5
− 0.652174u
4
+ ··· + 11.0435u + 0.434783
0.304348u
5
− 0.173913u
4
+ ··· + 2.47826u + 0.782609
a
5
=
1.08696u
5
− 0.478261u
4
+ ··· + 8.56522u − 0.347826
0.304348u
5
− 0.173913u
4
+ ··· + 2.47826u + 0.782609
a
4
=
1.08696u
5
− 0.478261u
4
+ ··· + 8.56522u − 0.347826
0.173913u
5
+ 0.0434783u
4
+ ··· + 2.13043u + 0.304348
a
7
=
−0.217391u
5
− 0.304348u
4
+ ··· + 0.0869565u − 3.13043
u
a
8
=
0.173913u
5
+ 0.0434783u
4
+ ··· + 1.13043u + 2.30435
−0.0869565u
5
+ 0.478261u
4
+ ··· − 1.56522u + 0.347826
a
9
=
−0.391304u
5
− 0.347826u
4
+ ··· − 2.04348u − 2.43478
0.0434783u
5
+ 0.260870u
4
+ ··· + 1.78261u − 0.173913
(ii) Obstruction class = −1
(iii) Cusp Shapes =
15
23
u
5
−
2
23
u
4
+
101
23
u
3
−
30
23
u
2
+
155
23
u +
101
23
10