A long plastic rod of 30-mm diameter (k = 0.3 W/m ∙ K and pc_p = 1040kJ/m³ ∙ K) is uniformly heated in an oven as preparation for a pressing operation. For best results, the temperature in the rod should not be less than 200°C. To what uniform temperature should the rod be heated in the oven if, for the worst case, the rod sits on a conveyor for 3 min while exposed to convection cooling with ambient air at 25°C and with a convection coefficient of 8 W/m² ∙ K? A further condition for good results is a maximum-minimum temperature difference of less than 10°C. Is this condition satisfied and, if not, what could you do to satisfy it?