The same spectral line undergoing anomalous Zeeman splitting is observed in direction 1 and, after reflection from

Question:

The same spectral line undergoing anomalous Zeeman splitting is observed in direction 1 and, after reflection from the mirror M (Fig. 6.9), in direction 2. How many Zeeman components are observed in both directions if the spectral line is caused by the transition?
(a) 2P3/2 → 2S1/2;
(b) 3P2 → 3S1?