A duct, consisted of four rectangular flat plates, are radiating with each other and nothing else…

A duct, consisted of four rectangular flat plates, are
radiating with each other and nothing else. Use the given data to find the
radiosity and the rate of heat transfer for each surface. Data: Length = 1 m,
depth, 2 m, height 0.5 m, T1 = 100 C, T2 = 200 C, T3
= 300 C, T4 = 400 C, _1 = 0.5, _= = 0.65,
_3 = 0.75, _4 = 0.8. The joins are well
insulated so that there is no heat transfer between the plates by thermal
conduction.