In the wild guinea pigs can jump 59 inches, (if fleeing a predator), so a domestic cavy should jump 20-25 inches maximum.
It depends on the guinea pig and their weight, I have two pigs and one can jump up maybe 1 foot and the other maybe 1/2 a foot.
It depends on how old you are and your sex. In high school boys starting height is usually around 5'6'' for girls it is a foot less 4'6''
I don't know but that's prety high
Yes. They don't jump for joy, but if they are cornered and want out, I have seen them jump a three foot partition. It was not pretty. I would add that the pigs generally do not clear the partition...