A $1\mathrm{.}11-$H inductor is connected in series with a variable capacitor in the tuning section of a short wave radio set. What capacitance tunes the circuit to the signal from a transmitter broadcasting at $6\mathrm{.}42$ MHz$?$

$($a$)$ Find the magnitude and direction of the magnetic field at a point midway between the wires.

magnitude

$$T

direction

$$ counterclockwise from the $+$x axis

$($b$)$ Find the magnitude and direction of the magnetic field at point P$,$ located d $=22\mathrm{.}0$ cm above the wire carrying the $4\mathrm{.}65-$A current.

magnitude

$$T

direction

$$ counterclockwise from the $+$x axis