3. A large artery containing warm blood flows through a colder tissue. You can assume that the system is at steady state. For the tissue, outside the artery you can assume that the heat transfer from the artery is purely convection with a constant h t . (A) Draw a circuit that represents the heat transfer in the system. Include the resistances for each component in terms of the parameters of the system shown below and the temperatures for each node of the circuit (6 points). (B) Find an expression for the temperature at the surface of the artery (T 2 ) in terms of just the temperatures Tt , and Ta , (not T1 ) the other parameters shown in the figure (6 points)