Answer
See below
Work Step by Step
The skin temperature is $95^{o}$ F, which is 308.15 K.
The frequency can be found using Wien's Displacement Law:
$f_{peak}$ = 5.88 X $10^{10}$ X T
$f_{peak}$ = 5.88 X $10^{10}$ X 308.15 = 1.8 X $10^{13}$ Hz.
The wavelength and frequency are related as
$\lambda $ f = c, where c is the speed of light. So
$\lambda$ X 1.8 X $10^{13}$ = 3 X $10^{8}$
$\lambda$ = $\dfrac{3}{1.8} \times 10^{-5}$ m = $1.67 \times 10^{-5}$ m
