A $50mm45mm20mm$ cell phone charger has a surface temperature of $T_s=33C$ when

plugged into an electrical wall outlet but not in use. The surface of the charger is of

emissivity $=0\mathrm{.}36$ and is subject to a free convection heat transfer coefficient of $h=2\mathrm{.}26$

$\frac{W}{m^2}K.$ The room air and wall temperatures are $T_{}=22C$ and $T_{\text{s}\text{u}\text{r}}=20C,$ respectively. What

is the total rate of heat transfer $[$W$]$ from the charger?