Answer
Please see the work below.
Work Step by Step
We know that
$P_{net}=e\sigma A(T_2^4-T_1^4)$
We plug in the known values to obtain:
$P=(1)(5.7\times 10^{-8})(1.4)((33+273.15)^4-(18+273.15)^4)$
$P=130W$
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