Not necessarily
Just the same way humans do.
Green monkeys exist in a polygamous society. Female green monkeys typically give birth to one baby monkey at a time.
Yes they have babies all the time, sometimes with monkeys and snakes.
Monkeys get pregnant and deliver babies and care for them very much the same way humans do those things. For the people who did not get this, monkeys have sex. The male monkey enters his penis into the female monkey's vagina so the sperm meets the egg and they can make a baby.
Assuming non died in the 5 year period. Year 1 2 monkeys + 2 babies Year 2 4 monkeys + 4 babies Year 3 8 monkeys + 8 babies Year 4 16 monkeys +16 babies Year 5 32 monkeys + 32 babies So at the end of year 5 there would be 64 monkeys.
In the trees
Nope
None.
In their Diapers.
Just like we do
all of the female dinosaurs , they are oviparous
Yes monkeys have babies that eventually grow up to be adults.