THE FOLLOWING QUESTIONS HAVE CONFOUNDED ME SINCE I WAS TEN YEARS OLD

In regards to 1971's Escape from the Planet of the Apes, how did three chimpanzee scientists, Cornelius, Zira, and Milo, manage to do all of the following:

1) Find Taylor's spacecraft
2) Raise it from the bottom of a lake bed
3) Repair all the damage to the ship
4) Make it air tight again
5) Replace the explosively-detonated escape hatch
6) Restore power to the ship
7) Get the spacecraft back into Earth orbit
8) Figure out how to do any of this when they don't even believe that Ape can fly, let alone that Man is smart enough to fly
9) Do all this in a matter of hours

Granted, all of this led to one of the greatest undiscovered gems of all time, but come on. Not to mention Zira was apparently 8+ months pregnant through all of this.