Two very long straight wires $19\mathrm{.}7$ cm apart carry equal currents I in the opposite directions. Do they attract or repel each other. What is then the current I, if the force per unit length between them $8\mathrm{.}8$ nano $\backslash (\backslash$mathrm$\{$N$\}/\backslash$mathrm$\{$m$\}\backslash ).$ Please input your current answer in mA with one decimal place. $($Note $1$ nano $\backslash (=10^\{-9\}\backslash ))$