3. = 6 pts Consider a unit long heated bar with diffusivity coefficient 0.1 m/sec, initial temperature uz,0) = 40 and zero boundary conditions at the ends. a. State the general, specific and the numerical mathematical model applica- ble for this scenario, b. Use the numerical model to find the time when the temperature in the middle is 40/2 c. Verify your solution. 3. = 6 pts Consider a unit long heated bar with diffusivity coefficient 0.1 m/sec, initial temperature uz,0) = 40 and zero boundary conditions at the ends. a. State the general, specific and the numerical mathematical model applica- ble for this scenario, b. Use the numerical model to find the time when the temperature in the middle is 40/2 c. Verify your solution