A double-glazed window consists of two sheets of glass separated by an L = 0.2-mm-thick gap. The gap is evacuated, eliminating conduction and convection across the gap. Small cylindrical pillars, each L = 0.2 mm long and D = 0.15 mm in diameter, are inserted between the glass sheets to ensure that the glass does not break due to stresses imposed by the pressure difference across each glass sheet. A contact resistance of R"_t,c  =1.5 X 10^–6 m² · K/W exists between the pillar and the sheet. For nominal glass temperatures of T_{1 =} 20°C and T₂ = 10°C, determine the conduction heat transfer through an individual stainless steel pillar.