Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 22°C. We apply continuously 73°C heat to the field 6x4
What is the temperature (rounded to whole numbers) in the field 0x9 after 150 iterations according to the Gauss-Seidel iteration

Field in the beginning

22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22

Field after 4 iterations (rounded after 4th iteration)

3	5	6	7	7	7	8	7	5	3
5	9	11	12	13	14	16	14	10	5
6	11	14	15	18	24	30	25	17	9
7	12	15	19	25	40	60	42	26	12
7	13	17	21	33	61	134	63	33	15
7	13	17	22	30	46	66	48	29	14
7	13	17	20	26	33	40	34	23	12
7	11	15	18	21	24	27	24	17	9
5	9	11	13	15	17	17	15	11	6
3	4	6	7	8	8	8	7	5	3

Temperature in field 0x9 after 150 iterations:

22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22

3	5	6	7	7	7	8	7	5	3
5	9	11	12	13	14	16	14	10	5
6	11	14	15	18	24	30	25	17	9
7	12	15	19	25	40	60	42	26	12
7	13	17	21	33	61	134	63	33	15
7	13	17	22	30	46	66	48	29	14
7	13	17	20	26	33	40	34	23	12
7	11	15	18	21	24	27	24	17	9
5	9	11	13	15	17	17	15	11	6
3	4	6	7	8	8	8	7	5	3

22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22

3	5	6	7	7	7	8	7	5	3
5	9	11	12	13	14	16	14	10	5
6	11	14	15	18	24	30	25	17	9
7	12	15	19	25	40	60	42	26	12
7	13	17	21	33	61	134	63	33	15
7	13	17	22	30	46	66	48	29	14
7	13	17	20	26	33	40	34	23	12
7	11	15	18	21	24	27	24	17	9
5	9	11	13	15	17	17	15	11	6
3	4	6	7	8	8	8	7	5	3

22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22
22	22	22	22	22	22	22	22	22	22

3	5	6	7	7	7	8	7	5	3
5	9	11	12	13	14	16	14	10	5
6	11	14	15	18	24	30	25	17	9
7	12	15	19	25	40	60	42	26	12
7	13	17	21	33	61	134	63	33	15
7	13	17	22	30	46	66	48	29	14
7	13	17	20	26	33	40	34	23	12
7	11	15	18	21	24	27	24	17	9
5	9	11	13	15	17	17	15	11	6
3	4	6	7	8	8	8	7	5	3