In the below circuit, determine the phase angle between the applied voltage and the current at the first critical frequency $f_1($i$.$e$.f_1=f_r-B\frac{W}{2}).$

$R=9,L=14H,C=13nF,$ and $|Vs|=5V$ and $0$ phase

If the current is leading the angle should be positive and if the voltage is leading the angle should be negative.

The result should be in degrees.

Calculate Answers to $2$ decimal points