Help finishing challenges

Would a few people be willing to get together to create a Fireteam lobby to help me finish these three challenges? The two Season 6 challenges are the only two I need left to complete all Season challenges from all six seasons, and the four piece dinner is the last multiplayer challenge I have besides a few more quad feeds. I really want to 100% multiplayer and these challenges are all I have left but unfortunately no one plays Fireteam anymore. Thanks!