The capacitance C, the resistance R, and the inductor L are connected in series to the alternating current circuit. The amplitude of the alternating voltage is Um = 220 V. Find the amplitude of the voltage drop across the capacitor UCm, the resistance URm, and the inductance ULm, if it is known that the external voltage is ahead of the current in phase by 30 °, and ULm = 4 * UCm.

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