Determine the power dissipated in W in the 5 Ω resistor
V2, L1, and R1 are red herrings - don't pay attention to them. You know the reactive power dissipated by the capacitor as well as its reactance. This yields the RMS voltage across the capacitor by Ohm's law. But the capacitor is in parallel with R2, so you immediately know the RMS voltage across the resistor. With the resistance and RMS voltage, you can easily determine the average power dissipation in the resistor.