II.
I
u
2
= h9.18×10
17
u
38
−1.34×10
19
u
37
+· · ·+9.06×10
15
b−3.91×10
19
, −1.28×
10
19
u
38
+4.99×10
19
u
37
+· · ·+9.06×10
15
a−3.71×10
18
, u
39
−5u
38
+· · ·−9u+1i
(i) Arc colorings
a
8
=
0
u
a
11
=
1
0
a
12
=
1
u
2
a
2
=
1417.04u
38
− 5503.02u
37
+ ··· + 3313.37u + 409.854
−101.309u
38
+ 1483.15u
37
+ ··· − 21944.4u + 4316.19
a
7
=
u
u
a
3
=
1672.55u
38
− 6652.10u
37
+ ··· + 7245.12u − 195.711
154.203u
38
+ 334.074u
37
+ ··· − 18012.6u + 3710.62
a
1
=
−6028.69u
38
+ 27194.1u
37
+ ··· − 85705.9u + 12281.3
−19626.0u
38
+ 89034.5u
37
+ ··· − 288221.u + 41765.0
a
6
=
9317.72u
38
− 41268.0u
37
+ ··· + 116538.u − 15918.4
13957.7u
38
− 62051.3u
37
+ ··· + 178722.u − 24480.5
a
9
=
−34297.2u
38
+ 154375.u
37
+ ··· − 477938.u + 67924.1
−25809.4u
38
+ 116867.u
37
+ ··· − 373807.u + 53904.3
a
5
=
−1623.45u
38
+ 7364.96u
37
+ ··· − 23617.2u + 3241.46
10662.2u
38
− 47331.4u
37
+ ··· + 135007.u − 18407.6
a
10
=
45853.7u
38
− 207137.u
37
+ ··· + 655551.u − 93993.3
10529.3u
38
− 47691.1u
37
+ ··· + 153327.u − 22129.9
a
4
=
−3555.55u
38
+ 16760.9u
37
+ ··· − 71534.6u + 11256.4
−9390.03u
38
+ 41903.9u
37
+ ··· − 128358.u + 17968.8
(ii) Obstruction class = 1
(iii) Cusp Shapes = −
389178706152018704476
9062374718835497
u
38
+
1773907411422215220288
9062374718835497
u
37
+ ··· −
6037733369173327592722
9062374718835497
u +
885315973119248416826
9062374718835497
22