$4.$ What is the maximum load permitted on a $220$ volt, three$-$phase, #$10$ RHW stranded uncoated copper conductor $160$ feet from the source?

$($a$)16\mathrm{.}63$ amps $($b$)17\mathrm{.}38$ amps $($c$)19\mathrm{.}2$ amps $($d$)23$ amps