The transfer function of a second order real system with a perfectly flat magnitude response of unity has a pole at $(2 − j3)$. List all the poles and zeroes.
1. Poles at $(2 \pm j3)$, no zeroes.
2. Poles at $(\pm 2 − j3)$, one zero at origin.
3. Poles at $(2 − j3)$, $(−2 + j3)$, zeroes at $(−2 − j3)$, $(2 + j3)$.
4. Poles at $(2 \pm j3)$, zeroes at $(−2 \pm j3)$.