Determine the net radiative heat transfer in an isosca ales trapezoid (meaning,a trapezoid with two parallel lines, a 2 sets of equal angles). The two parallel lines have lengths of 0.1 (and emiss sivity of 0.9) and 0.5 (emissivity of 0.8),The other 2 sides ha ave lengths of 0.3, and both have emissivities of 0.9.