A hot water pipe with outside radius $\backslash ($ r$\_\{1\}\backslash )$ has a temperature $\backslash ($ T$\_\{1\}\backslash ).$ A thick insulation, applied to reduce the heat loss, has an outer radius $\backslash ($ r$\_\{2\}\backslash )$ and temperature $\backslash ($ T$\_\{2\}\backslash ).$ On $\backslash ($ T$-$r $\backslash )$ coordinates, sketch the temperature distribution in the insulation for one$-$dimensional, steady$-$state heat transfer with constant properties. Give a brief explanation, justifying the shape of your curve.