At a certain distance from a point charge, the potential and electric$-$field magnitude due to that charge are $4\mathrm{.}98$ V and $16\mathrm{.}2$ V$/$m$,$respectively. $($Take V $=0$ at infinity.$)($a$)$ What is the distance to thepoint charge? $($b$)$ What is the magnitude of the charge? $($c$)$ Is the electric field directed toward or away from the point charge?