4.) Figure 17.26 on page 438 shows a thermal system involving two compartments, with one containing a heater. If the temperature of the compartment containing the heater is T1, the

temperature of the other compartment is T, and the temperature surrounding the compartments is T3, develop equations describing how the temperature T,and T2 vary with time. All the walls of the containers have the same thermal resistance and negligible capacity. The two containers have the same thermal capacitance C. [20 pts]