Physics advanced, help , pls

Question

2. In an electric circuit, a coil is connected in series with the inductance 52 mH and one capacitor with capacitance of 20 pF together. At what frequency does resonance occur in the circuit?

https://imgur.com/yJoUqk7

3. A capacitor is connected in series with a resistor R = 10.0 ohm. At frequency 1.00 kHz, the power values ​​of the voltages are shown in the figures below. Calculate the capacitance of the capacitor, the total voltage U, and the circuit impedance.

4. A signal generator provides a sinusoidal AC voltage with the constant the effective value is 3.0 V. The frequency can be varied in the range of 10 Hz to 100 kHz. one coil with resistance 2.5  and inductance 13 mH connected in series with one capacitor with a capacitance of 1.0 μF and connected to the signal generator. then the frequency changes, the current in the circuit will also change. Calculate the minimum and minimum. maximum value of the current's effective value. Also specify the frequencies at which you get these values ​​for the current. Calculate also the power development in the circuit in the two cases.

Answer 1

#2: use the formula for resonance: f = 1 / (2π * √(L*C))

note that mH = millihenries. 1mH = 1E-3 Henry

pF = picofarards. 1 pF = 1E-12 Farad

#3 There is no figure

#4 First, find out if there is a resonance within the stated frequency range. If there is, then the current will be determined solely by the resistor (at the frequency of resonance)