Calculate the de Broglie wavelength of an electron moving with a velocity of $5.0\times10^5ms^{–1}$

Question

$\begin{array}{1 1}(a)\;1.46\times10^{-9}m\\(b)\;2.46\times10^{-9}m\\(c)\;1.08\times10^{-9}m\\(d)\;1.46\times10^{-19}m\end{array}$