Answer
$f=3.0\times10^{18}Hz$, $T=3.3\times10^{-19}s$, $k=6.3\times10^{10} m^{-1}$.
Work Step by Step
All electromagnetic waves travel through vacuum at the speed of light.
$$f=\frac{c}{\lambda}=\frac{3.00\times10^{8}m/s}{0.10\times10^{-9}m}=3.0\times10^{18}Hz$$
$$T=\frac{1}{f}=3.3\times10^{-19}s$$
$$k=\frac{2 \pi}{\lambda}=\frac{2 \pi}{0.10\times10^{-9}m}=6.3\times10^{10} m^{-1}$$
