In the crossover network of Problem 61, the inductance L is 1.20 mH. The capacitor is variable;

Question:

In the crossover network of Problem 61, the inductance L is 1.20 mH. The capacitor is variable; its capacitance can be adjusted to set the crossover point according to the frequency response of the woofer and tweeter. What should the capacitance be set to for a crossover point of 180 Hz?