in Chapter 16 of Huck Finn i have 8 questions

As Jim and Huck get closer to cairo, what are they afraid of?

What do they decide to do?

Why is jim So excited to see cairo? why does huck not share his enthusiasm?

what are jims plans when he is finally free?

what does huck tell the slave catchers? how does he get rid of them? why doesnt he tell them about jim?

if they passed cairo, why cant they go back?

what happens to the raft?

what happens to jim and huck?