If it's AC you're missing some values for voltage and frequency.
With the given parameters, in the absence of frequency and voltage it will not be possible to calculate the impedance & the source current. Both of them are essential.
Measure the Voltage (Vr) across the 470 Ohm resistor.
Source current = Vr/470 Ohms
Hope this helped.
With no voltage, you cannot calculate the current. You also need the frequency.