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 79°C heat to the field 0x3
What is the temperature (rounded to whole numbers) in the field 6x4 after 142 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)

6	9	10	10	10	10	10	9	7	3
17	21	20	19	18	18	17	15	11	6
42	37	31	26	24	23	22	20	15	8
115	58	39	31	28	27	25	22	17	9
45	42	36	32	29	28	27	24	18	9
22	30	31	30	29	29	27	24	18	10
14	23	26	28	28	28	27	24	18	9
11	18	22	24	24	25	24	21	15	8
7	12	16	17	18	19	18	15	11	6
4	6	8	9	10	10	9	8	6	3

Temperature in field 6x4 after 142 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

6	9	10	10	10	10	10	9	7	3
17	21	20	19	18	18	17	15	11	6
42	37	31	26	24	23	22	20	15	8
115	58	39	31	28	27	25	22	17	9
45	42	36	32	29	28	27	24	18	9
22	30	31	30	29	29	27	24	18	10
14	23	26	28	28	28	27	24	18	9
11	18	22	24	24	25	24	21	15	8
7	12	16	17	18	19	18	15	11	6
4	6	8	9	10	10	9	8	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

6	9	10	10	10	10	10	9	7	3
17	21	20	19	18	18	17	15	11	6
42	37	31	26	24	23	22	20	15	8
115	58	39	31	28	27	25	22	17	9
45	42	36	32	29	28	27	24	18	9
22	30	31	30	29	29	27	24	18	10
14	23	26	28	28	28	27	24	18	9
11	18	22	24	24	25	24	21	15	8
7	12	16	17	18	19	18	15	11	6
4	6	8	9	10	10	9	8	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

6	9	10	10	10	10	10	9	7	3
17	21	20	19	18	18	17	15	11	6
42	37	31	26	24	23	22	20	15	8
115	58	39	31	28	27	25	22	17	9
45	42	36	32	29	28	27	24	18	9
22	30	31	30	29	29	27	24	18	10
14	23	26	28	28	28	27	24	18	9
11	18	22	24	24	25	24	21	15	8
7	12	16	17	18	19	18	15	11	6
4	6	8	9	10	10	9	8	6	3