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A Circuit consisting of a 500 Ohm Resistor in series with a 1.2 micro F capacitor is connected to a supply at a frequency of 400Hz. Use complex numbers to determine the values of resistance R and capacitance C, that when connected in parallel will present the same value of impedance to the supply.

I'm really not very sure at all where to start here, I've drawn the circuits in series and parallel, I have the complex impedance of the series circuit:

500 - j331 but I don't know where to go from here.

Thanks.