(20 pts) A slab of meat 24mm thick, 8cm long, and 4cm wide originally at a uniform temperature of 10C is to be cooked from both sides until the center reaches 72C within 45min in an oven at 180C. Neglect any latent heat changes and calculate the convective heat transfer coefficient. The thermal conductivity is 0.69W/m.K and the thermal diffusivity 5.85104m2/h