Thanks, Ravn! Note: the connector is called a 6-pin mini-DIN, and the keyboard and mouse connector pinout charts above show six pins, but some mice and keyboards are made with the (male) connector having only four pins (i.e., with the unconnected pin 2 and pin 6 missing).
Use general age categories to categorize the rabbit. This will give you a good way of starting your assessment. A young rabbit is up to 9 months of age. An adult rabbit is approximately 9 months to 4 - 5 years of age. An elderly rabbit is 4 - 5 years upwards. Some rabbits live to be 10 - 12 years of age.
The mother will wean them all by herself. Don't bother removing them one at a time, she takes care of the weaning as her milk dries up. Rabbit kits should be weaned at 9 weeks of age. No less because it still needs it's mother's care and milk.