A vertical wall between the residential space and the adjacent garage of a home consists of $2($width$)4($depth$)$ in$.(510cm)$ framing on $16in.(40cm)$ centers between two $0\mathrm{.}5in..12$ mm $)($thickness$)$ sheets of drywall $($gypsum board$).$ The stud space is uninsulated, and the still air temperatures on the two sides of the wall are $72F$ and and $($:$16C$