Level 29

You see a room which is 10x10m wide (0x0 to 9x9).
Every square has the exact temperature of 1°C. We apply continuously 156°C heat to the field 5x4
What is the temperature (rounded to whole numbers) in the field 4x7 after 75 iterations according to the Gauss-Seidel iteration

Field in the beginning

1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111
1111111111

Field after 4 iterations (rounded after 4th iteration)

0000011110
0001376421
00141629231473
0131646895629146
01729892459843198
0172356986435177
0151429433522136
01371420181384
0124799752
0012344321

Temperature in field 4x7 after 75 iterations: