Hottel charts not provided. I dont need specific values. Just guuide me step$-$by step through the working.Shown in Figure Q$\mathrm{.}3$$($a$)($page $6)$ is a model of a small furnace. Thedimensions are $?=80??,{?}_3=40??$ and $?=50??.$ In this furnace agaseous mixture containing $49\mathrm{.}4\%$ of $?{?}_2$ and $12\mathrm{.}36\%$ of water vapourand $38\mathrm{.}24\%{?}_2$ is maintained at a temperature of $727?$ and $100$kPapressure. The bottom surface $(2)$ which has an emissivity of $0\mathrm{.}8$ is at atemperature of $600?$ while the combined top and the conical surface $(1)$is at a temperature of $400?,$ emissivity $0\mathrm{.}9.$The configuration factor between area ${?}_1$ and area ${?}_2$ in thisconfiguration may be obtained from${?}_{1-2}=\frac{2?2-?+(?2-4?2)\frac{1}{2}}{2(?-2?)\frac{1}{2}*(1+?)}$where $?=\frac{?}{{?}_3},?=\frac{?}{{?}_3}$ and $?=(1+?2+?2).$ The combined area ofsurface $1$ is ${?}_1={?}_3^2+(?+{?}_3)\sqrt[\phantom{\mathrm{}}]{(?-{?}_3)2+?2}.$Configuration factors ${?}_{1-?}$ and ${?}_{2-?}$ may be taken as $1\mathrm{.}0,$ here $?$ represents thegaseous medium.a$)$ Calculate the configuration factor ${?}_{1-2}.$$[2$ marks$]$b$)$ Using a value of $0\mathrm{.}5?$ for the path length estimate the emissivity ofthe gaseous mixture with the aid of Figures Q$\mathrm{.}3($b$)($page $7)$ andQ$\mathrm{.}3($c$)($page $8).$$[3$ marks$]$c$)$ Draw the equivalent electrical network for this configurationincluding gaseous radiation.$[4$ marks$]$d$)$ Calculate the heat transfer from gas and heat transfer at eachsurface.$[5$ marks$]$e$)$ Will the heat transfer to the conical surface increase or decrease ifthe gas pressure is increased to $2$ bar? Explain your answer? Thegas temperature remains at $727?.$$[2$ marks$]$f$)$ Will the heat transfer to the conical surface increase or decrease ifthere are black soot particles in the gas mixture? Why? Assume thesoot particles are in thermal equilibrium with the gas at $727?.$$[2$ marks$]$g$)$ Will the Hottel chart still be applicable if the conical surface and thebottom plates are transparent in part of the infrared spectrum?Why?Figure Q$\mathrm{.}3($a$)$

h Figure Q.3(a) A2