$($a$)$

A moving electron has a kinetic energy of $1\mathrm{.}25$ eV$.$ What is the wavelength of this electron $($in m$)?$

$1\mathrm{.}09$e$-9$ m

$($b$)$

A photon with an energy of $1\mathrm{.}25$ eV has what corresponding wavelength $($in m$)?$

$9\mathrm{.}93$e$-7$ m