Could you help me to check my answer and correct the wrong the one (Nascent Stage) When the mid-latitude cyclone develops Instability develops in the...

Could you help me to check my answer and correct the wrong the one

(Nascent Stage)

1. When the mid-latitude cyclone develops
2. Instability develops in the stationary front ( I choose 2.)
3. When the mid-latitude cyclone dies out
4. When the cold front completely takes over the warm front
5. When the cold front "starts" to take over the warm front