Jumbo Frame Between 2 PC's

General question, sorry if this was asked before.

PC1 running 9K MTU - 10.2.2.0/24

PC2 running 1500MTU - 10.2.2.0/24

PC3 running 1500MTU - 10.3.3.0/24

Gateways in between all 9K capable

Can PC1 communicate with PC3 with a packet that is 9K in size?

Can PC1 communicate with PC2 with a packet that is 9K in size?

It's my understanding that the gateway will separate the 9K packet into smaller packets. But will PC2 be able to negotiate maximum packet size with PC1 since they are on the same subnet? Or does it require a gateway in between to do this?

Also, this is all assuming the don't fragment flag is not set. Thank you! I'm not lazy I just can't find any good info on this. Links to articles are great, make me read!