I NEED HELP WITH HALO 1 LEGENDARY CO-OP

Hi people I need help with Halo 1 Legendary on the last four missions.

I’ve already done halo 2,3 & 4 on Legendary on solo but halo 1 is hardest one I’ve come across.

If anyone needs help with 1, 2,3 & 4 on Legendary I’m free to help.

I’m from the UK and my gamertag is MythicCypher.