Thermal annealing is a method applied to materials to change structure and mechanical properties. A 200 mm thick plate that is made of 316 stainless steel (See Appendix A for properties or use another reputable source). The initial temperature of the plate is uniform through its thickness and is 270C and it must be heated to at least 550C. The heating is done in a furnace, where the combustion produces gases at 875C and the convection coefficient is 250 W/(m2 K). How long should the plate be held in the furnace? You may neglect radiation.