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 75°C heat to the field 5x3
What is the temperature (rounded to whole numbers) in the field 8x4 after 74 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	11	13	12	10	8	4
7	12	14	18	24	31	27	21	15	7
8	14	19	28	43	64	48	33	21	10
9	16	23	36	67	142	71	42	25	12
10	17	24	35	52	73	56	40	26	13
10	17	24	31	40	47	43	34	24	12
10	17	23	28	32	36	34	29	21	11
9	15	20	23	26	28	27	24	17	9
7	11	15	17	19	20	19	17	12	6
3	6	8	9	10	10	10	8	6	3

Temperature in field 8x4 after 74 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	11	13	12	10	8	4
7	12	14	18	24	31	27	21	15	7
8	14	19	28	43	64	48	33	21	10
9	16	23	36	67	142	71	42	25	12
10	17	24	35	52	73	56	40	26	13
10	17	24	31	40	47	43	34	24	12
10	17	23	28	32	36	34	29	21	11
9	15	20	23	26	28	27	24	17	9
7	11	15	17	19	20	19	17	12	6
3	6	8	9	10	10	10	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

4	7	8	9	11	13	12	10	8	4
7	12	14	18	24	31	27	21	15	7
8	14	19	28	43	64	48	33	21	10
9	16	23	36	67	142	71	42	25	12
10	17	24	35	52	73	56	40	26	13
10	17	24	31	40	47	43	34	24	12
10	17	23	28	32	36	34	29	21	11
9	15	20	23	26	28	27	24	17	9
7	11	15	17	19	20	19	17	12	6
3	6	8	9	10	10	10	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

4	7	8	9	11	13	12	10	8	4
7	12	14	18	24	31	27	21	15	7
8	14	19	28	43	64	48	33	21	10
9	16	23	36	67	142	71	42	25	12
10	17	24	35	52	73	56	40	26	13
10	17	24	31	40	47	43	34	24	12
10	17	23	28	32	36	34	29	21	11
9	15	20	23	26	28	27	24	17	9
7	11	15	17	19	20	19	17	12	6
3	6	8	9	10	10	10	8	6	3