Find zeq1s and zeq2s and express each impedance as a

Question

For the two-port circuit of Figure:

(a) Find Z_EQ1(s) and Z_EQ2(s), and express each impedance as a rational function and locate its poles and zeroes.

(b) Select values of R and L to place a pole at -1 kHz.

Question :

Find the equivalent impedance between terminals 1 and 2 in Figure P10-15. Select values of R and L so that Z_EQ(s) has a pole at s = -3.3 krad/s. Locate the zeroes of Z_EQ(s) for your choice of R and L.