questions pred weapons

So i have a few questions regarding pred weapons.

Does the melee perk work with the combi stick when thrown or is it down range that ups the damage from that.

same goes with the disk. is it considered ranged or melee?

does the aoe damage from the caster and the heldheld get buffed by downrange or not? the reason i ask is the support has resistance to explosions and the damage from the aoe from both is reduced by the supports passive.

does the motion tracker work if you stick it to the top of buildings and the fireteam inside? i have tested this and can’t seem to get it to work but then again i could just be getting unlucky with my aim.

A lot of people say the trapper perk works with the netgun and others say it doesn’t so which one is it?

the pred persk high ground and impenetrable. do they stack? some say yes some say no.

i am only asking this cause sadly i don’t have others to play this game with so i actually can’t test this stuff reliably.