Using the crack method, compute the infiltration for a swinging door that is used occasionally, assuming it is $($a$)$ tight$-$fitting, $($b$)$ average$-$fitting, and $($c$)$ loose$-$fitting. The door has dimensions of $0\mathrm{.}92\mathrm{.}0m$ and is on the windward side of a house exposed to a $13\frac{m}{s}$ wind. Neglect intemal pressurization and stack effect. If the door is on a bank in Rapid City, SD$,$ what is the resulting heating load due to the door for each of the fitting classifications?