The solid in Problem 3-58 is initially uniform in temperature at 100C and then suddenly exposed to

The solid in Problem 3-58 is initially uniform in temperature at 100ºC and then suddenly exposed to the convection condition while the right and bottom faces are held constant at 100ºC. Select a value for ∆τ and calculate the nodal temperatures after 10 time increments. Take ρ = 3000 kg/m3 and c = 800 J/kg · ºC.