Reactance and phase in code

You will write four functions that a circuit designer might use for a coil or a capacitor on an AC source.

The idea. A coil has $X_L = 2\pi f L$ and a capacitor has $X_C = \dfrac{1}{2\pi f C}$. The rms current is the rms voltage divided by the reactance. A delay of $\Delta t$ at the frequency $f$ is the phase $360^\circ \times f\,\Delta t$.

Your tasks.

1. In coil_reactance, return $X_L$ in ohm for an inductance in H and a frequency in Hz.
2. In capacitor_reactance, return $X_C$ in ohm for a capacitance in F and a frequency in Hz.
3. In rms_current, return the rms current in A for an rms voltage in V and a reactance in ohm.
4. In phase_degrees, return the phase in degrees for a delay in s at a frequency in Hz.