Using only passive components (R, L, C), design: A bandstop (notch) filter with a center frequency o

Using only passive components (R, L, C), design: A bandstop (notch) filter with a center frequency of 15KHZ, a notch depth of at least -20dB, a stop band which is 15 % of the center frequency (note that the stop depth), and ameasured gain of -3dB a decade above and a decade below the center frequency. band is defined as 3dB up from the notch