Two parallel wires separated by $3\mathrm{.}80$ cm repel each other with a force per unit length of $1\mathrm{.}60$ x $10-4$ N$/$m$.$ The current in one wire is $5\mathrm{.}45$ A$.$

$($a$)$ Find the current in the other wire.

$5\mathrm{.}58$ A

$($b$)$ Are the currents in the same direction or in opposite directions?

$$ the same direction opposite directions