According to the standard ICAO semi-circular cruising level system applied within the Bahrain FIR (ICAO Annex 2 Appendix 3), which cruising flight levels are assigned to IFR flights operating on magnetic tracks from 000° to 179° (Eastbound)?

1. Even Flight Levels (e.g., FL300, FL320, FL340, FL360)
2. Odd Flight Levels (e.g., FL290, FL310, FL330, FL350, FL370)
3. Any Flight Level ending in 50 (e.g., FL295, FL315)
4. Flight levels determined solely by aircraft gross weight regardless of track