${?}^{17}-131,$ A $4-m-$high and $6-m-$long wall is constructed of two large $0\mathrm{.}8-cm-$thick steel plates $(k=15\frac{W}{m}*K)$ separated by $1-cm-$thick and $22-$cm$-$wide steel bars placed $99$ cm apart. The remaining space between the steel plates is filled with fiberglass insulation $)=(0\mathrm{.}035\frac{W}{m}*K.$ If the temperature difference between the inner and the outer surfaces of the walls is $22C,$ determine the rate of heat transfer through the wall. Can we ignore the steel bars between the plates in heat transfer analysis since they occupy only I percent of the heat transfer surface area?