Consider the 75 cm x 75 cm heated square below. The top face is exposed to an environment at 15 C, while the other three faces are maintained at 50 C: h 12 W/m C and k = 1.5 W/m.C h-12 W/m+"C T=-15C T=50C 2 4 T=50C 5 6 T-50C Ax Ay 25 cm k = 1.5 W/m "C Write the set of finite difference equations describing the heat transfer process of the nodes 1, 2, 3, 4, 5, and 6, and put all parameters in the cells below: [A][T] = [C] T1 T2 T3 T4 Ts T6 Constant Node # 1 2 3 4 5 9. 6