The two wires shown in Figure P$30\mathrm{.}19$ are separated by $d=10\mathrm{.}0cm$ and carry currents of $I=5\mathrm{.}00A$ in opposite directions. Find the magnitude and direction of the net magnetic field $($a$)$ at a point midway between the wires; $($b$)$ at point $P_1,10\mathrm{.}0cm$ to the right of the wire on the right; and $($c$)$ at point $P_2,2d=20\mathrm{.}0cm$ to the left of the wire on the left.

Using Biot$-$Savart Law