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 172°C heat to the field 2x7
What is the temperature (rounded to whole numbers) in the field 4x6 after 69 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	20	22	22	22	19	15	8
9	16	21	24	25	25	25	22	17	9
10	20	28	31	30	29	27	24	18	9
14	34	53	49	41	34	30	25	19	10
25	67	118	85	57	41	33	26	19	10
37	111	288	129	69	44	33	25	17	8
28	70	120	84	54	36	26	19	13	6
14	32	47	39	28	20	14	10	7	3

Temperature in field 4x6 after 69 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	20	22	22	22	19	15	8
9	16	21	24	25	25	25	22	17	9
10	20	28	31	30	29	27	24	18	9
14	34	53	49	41	34	30	25	19	10
25	67	118	85	57	41	33	26	19	10
37	111	288	129	69	44	33	25	17	8
28	70	120	84	54	36	26	19	13	6
14	32	47	39	28	20	14	10	7	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	20	22	22	22	19	15	8
9	16	21	24	25	25	25	22	17	9
10	20	28	31	30	29	27	24	18	9
14	34	53	49	41	34	30	25	19	10
25	67	118	85	57	41	33	26	19	10
37	111	288	129	69	44	33	25	17	8
28	70	120	84	54	36	26	19	13	6
14	32	47	39	28	20	14	10	7	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	20	22	22	22	19	15	8
9	16	21	24	25	25	25	22	17	9
10	20	28	31	30	29	27	24	18	9
14	34	53	49	41	34	30	25	19	10
25	67	118	85	57	41	33	26	19	10
37	111	288	129	69	44	33	25	17	8
28	70	120	84	54	36	26	19	13	6
14	32	47	39	28	20	14	10	7	3