The solid in Problem 3-62 is initially uniform in temperature at 500C and suddenly exposed to the convection boundary while the inner surface is kept

The solid in Problem 3-62 is initially uniform in temperature at 500ºC and suddenly exposed to the convection boundary while the inner surface is kept constant at 500ºC. Select a value for ∆τ and calculate the nodal temperatures after 10 time increments. Take ρ = 500 kg/m3 and c = 810 J/kg · ºC.