Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 35°C. We apply continuously 162°C heat to the field 2x8
What is the temperature (rounded to whole numbers) in the field 0x4 after 73 iterations according to the Gauss-Seidel iteration

Field in the beginning

35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35

Field after 4 iterations (rounded after 4th iteration)

5	8	10	11	12	12	12	11	8	4
8	14	17	19	20	21	20	18	14	7
10	17	22	25	26	27	26	23	18	9
11	19	25	28	29	30	29	26	20	10
12	20	27	30	32	32	32	28	21	11
12	23	33	36	36	35	33	29	22	12
15	36	55	52	45	39	35	30	22	11
25	65	114	83	57	42	34	28	19	10
34	102	267	117	62	39	29	22	15	7
21	54	95	62	37	23	16	12	8	4

Temperature in field 0x4 after 73 iterations:

35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35

5	8	10	11	12	12	12	11	8	4
8	14	17	19	20	21	20	18	14	7
10	17	22	25	26	27	26	23	18	9
11	19	25	28	29	30	29	26	20	10
12	20	27	30	32	32	32	28	21	11
12	23	33	36	36	35	33	29	22	12
15	36	55	52	45	39	35	30	22	11
25	65	114	83	57	42	34	28	19	10
34	102	267	117	62	39	29	22	15	7
21	54	95	62	37	23	16	12	8	4

35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35

5	8	10	11	12	12	12	11	8	4
8	14	17	19	20	21	20	18	14	7
10	17	22	25	26	27	26	23	18	9
11	19	25	28	29	30	29	26	20	10
12	20	27	30	32	32	32	28	21	11
12	23	33	36	36	35	33	29	22	12
15	36	55	52	45	39	35	30	22	11
25	65	114	83	57	42	34	28	19	10
34	102	267	117	62	39	29	22	15	7
21	54	95	62	37	23	16	12	8	4

35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35
35	35	35	35	35	35	35	35	35	35

5	8	10	11	12	12	12	11	8	4
8	14	17	19	20	21	20	18	14	7
10	17	22	25	26	27	26	23	18	9
11	19	25	28	29	30	29	26	20	10
12	20	27	30	32	32	32	28	21	11
12	23	33	36	36	35	33	29	22	12
15	36	55	52	45	39	35	30	22	11
25	65	114	83	57	42	34	28	19	10
34	102	267	117	62	39	29	22	15	7
21	54	95	62	37	23	16	12	8	4