You have a $205$ resistor, a $0\mathrm{.}393$ H inductor, a $5\mathrm{.}07$ F capacitor, and a variable$-$frequency ac source with an amplitude of $2\mathrm{.}99$ V $.$ You connect all four elements together to form a series circuit.

Part A

At what frequency will the current in the circuit be greatest? Express your answer in radians per second.

Part B

What will be the current amplitude at this frequency?

Express your answer with the appropriate units. $$

Part C

What will be the current amplitude at an angular frequency of $405$ rad$/$s$?$

Express your answer with the appropriate units.

Part D

At this frequency, will the source voltage lead or lag the current?