How much work must be done to increase the speed of an electron from $($a$)0\mathrm{.}20c$ to $0\mathrm{.}22c$ and $($b$)$ from $0\mathrm{.}91c$ to $0\mathrm{.}93c?$ Note that the speed increase is $0\mathrm{.}02c$ in both cases.

$($a$)$ Number

Units

$($b$)$ Number

Units