Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 29°C. We apply continuously 63°C heat to the field 3x6
What is the temperature (rounded to whole numbers) in the field 8x2 after 144 iterations according to the Gauss-Seidel iteration

Field in the beginning

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

Field after 4 iterations (rounded after 4th iteration)

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	21	22	22	22	19	15	8
9	16	21	25	27	26	25	22	17	9
10	18	28	36	35	32	29	25	18	9
11	23	40	60	49	39	32	26	19	10
12	28	57	123	65	44	34	27	19	10
11	24	42	61	49	38	30	24	17	8
8	17	26	33	31	27	22	18	12	6
4	8	12	15	15	14	12	9	6	3

Temperature in field 8x2 after 144 iterations:

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	21	22	22	22	19	15	8
9	16	21	25	27	26	25	22	17	9
10	18	28	36	35	32	29	25	18	9
11	23	40	60	49	39	32	26	19	10
12	28	57	123	65	44	34	27	19	10
11	24	42	61	49	38	30	24	17	8
8	17	26	33	31	27	22	18	12	6
4	8	12	15	15	14	12	9	6	3

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	21	22	22	22	19	15	8
9	16	21	25	27	26	25	22	17	9
10	18	28	36	35	32	29	25	18	9
11	23	40	60	49	39	32	26	19	10
12	28	57	123	65	44	34	27	19	10
11	24	42	61	49	38	30	24	17	8
8	17	26	33	31	27	22	18	12	6
4	8	12	15	15	14	12	9	6	3

29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29
29	29	29	29	29	29	29	29	29	29

4	7	8	9	10	10	10	9	7	3
7	12	14	16	17	17	17	15	11	6
8	14	18	21	22	22	22	19	15	8
9	16	21	25	27	26	25	22	17	9
10	18	28	36	35	32	29	25	18	9
11	23	40	60	49	39	32	26	19	10
12	28	57	123	65	44	34	27	19	10
11	24	42	61	49	38	30	24	17	8
8	17	26	33	31	27	22	18	12	6
4	8	12	15	15	14	12	9	6	3