Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 17°C. We apply continuously 71°C heat to the field 2x2
What is the temperature (rounded to whole numbers) in the field 3x5 after 139 iterations according to the Gauss-Seidel iteration

Field in the beginning

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

Field after 4 iterations (rounded after 4th iteration)

4	10	17	14	11	8	7	6	4	2
10	27	48	34	22	16	12	10	7	4
17	48	121	56	32	21	16	13	9	5
14	34	56	42	30	22	18	15	10	5
11	22	32	30	25	21	18	15	11	6
8	16	21	22	21	19	18	15	11	6
7	12	16	18	18	18	17	14	11	5
6	10	13	15	15	15	14	13	9	5
4	7	9	10	11	11	11	9	7	3
2	4	5	5	6	6	5	5	3	2

Temperature in field 3x5 after 139 iterations:

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

4	10	17	14	11	8	7	6	4	2
10	27	48	34	22	16	12	10	7	4
17	48	121	56	32	21	16	13	9	5
14	34	56	42	30	22	18	15	10	5
11	22	32	30	25	21	18	15	11	6
8	16	21	22	21	19	18	15	11	6
7	12	16	18	18	18	17	14	11	5
6	10	13	15	15	15	14	13	9	5
4	7	9	10	11	11	11	9	7	3
2	4	5	5	6	6	5	5	3	2

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

4	10	17	14	11	8	7	6	4	2
10	27	48	34	22	16	12	10	7	4
17	48	121	56	32	21	16	13	9	5
14	34	56	42	30	22	18	15	10	5
11	22	32	30	25	21	18	15	11	6
8	16	21	22	21	19	18	15	11	6
7	12	16	18	18	18	17	14	11	5
6	10	13	15	15	15	14	13	9	5
4	7	9	10	11	11	11	9	7	3
2	4	5	5	6	6	5	5	3	2

17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17
17	17	17	17	17	17	17	17	17	17

4	10	17	14	11	8	7	6	4	2
10	27	48	34	22	16	12	10	7	4
17	48	121	56	32	21	16	13	9	5
14	34	56	42	30	22	18	15	10	5
11	22	32	30	25	21	18	15	11	6
8	16	21	22	21	19	18	15	11	6
7	12	16	18	18	18	17	14	11	5
6	10	13	15	15	15	14	13	9	5
4	7	9	10	11	11	11	9	7	3
2	4	5	5	6	6	5	5	3	2