A current$-$carrying conductor that is $4\mathrm{.}00{10}^{-2}m$ long is placed perpendicular to a magnetic field that has a strength of $6\mathrm{.}00{10}^{-2}T.$ During a $20\mathrm{.}0$ s time interval, $7\mathrm{.}00{10}^{19}$ electrons pass a point in the conductor. The magnitude of the average magnetic force exerted on the conductor, expressed in scientific notation, is $a.bc{10}^{-d}N.$ The values of $a,b,c,$ and $d$ are and