In a layer $2$ switched LAN, all links are running at $100$ Mbps$.$ STP uses all default port cost configuration. Non$-$root switch SW$2$ receives a Hello on its root port, with that Hello listing a root cost of $38.$ If SW$2$ then forwards a Hello out some other port, what root cost will SW$2$ list in that Hello?

$38$

$42$

$57$

$19$

None of these are correct