A 5-in. standard-steel angle is attached to a wall with a surface temperature of 600°F. The angle supports a 4.375-in. by 4.375-in. section of building bring whose mean thermal conductivity may be taken as 0.38 Btu/h ft °F. The convective heat transfer coefficient between all surfaces and the surrounding air is 8 Btu/h ft²°F. The air temperature is 80°F. Using numerical methods, determine
a. The total heat loss to the surrounding air;
b. The location and value of the minimum temperature in the brick.

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5 in. 5 in.