A composite wall is shown in the figure below. The inner side of the wall is subjected to airflow at $220C$ with a heat transfer coefficient of $30\frac{W}{m^2}.C$ and the outer side is subjected to airflow at $25C$ with hea transfer coefficient of $15\frac{W}{m^2}.C.$ If $k_1=0\mathrm{.}15\frac{W}{m}.C,k_2=3\frac{W}{m}.C,$ and $k_3=5\frac{W}{m}.C,$ Assume one dimensional heat flow. Show step by step calculations and answer the following;

a$.$ Draw the thermal resistance network

b$.$ Determine the convection resistance on the inner surface of the wall, $R_i$

c$.$ Determine conduction resistance, $R_l$

d$.$ Determine conduction resistance, $R_2$

e$.$ Determine conduction resistance, $R_3$

f$.$ Determine the convection resistance on the outer surface of the wall, $R_o$

g$.$ Determine total thermal resistance, $R_{\text{t}\text{o}\text{u}\text{t}}$

h$.$ Determine the rate of heat transfer across the wall, $Q$