Can you answer this physics problem? Thank you!

Two long straight parallel wires are $1\mathrm{.}00$ m apart as shown. The wire on the left carries a current $\backslash (\backslash$mathrm$\{$I$\}\_\{1\}\backslash )$ of $8\mathrm{.}00$ A and points up$.($a$)$What must the magnitude and direction of the current $\backslash (\backslash$mathrm$\{$I$\}\_\{2\}\backslash )$ be for the net magnetic field at point P to be zero $($b$)$ What is the force per length on wire $1$ due to wire $2?$