A. Your cat seems to be in serious medical condition. It is never good when a cat doesn't eat and going for an extended period of time (days) without eating in cats can create a condition called hepatic lipidosis or "fatty liver" disease which can make her even sicker.
The green liquid you mentioned is bile and this comes from the small intestines and is a very vague symptom of nausea and upset GI tract. It can be associated with many diseases including: dietary indiscretion, pancreatitis, acid reflux disease, etc.
And low urine and feces output means that you pet is not getting enough nutrition overall, I am very concerned and encourage you to get her seen by a vet for a thorough physical examination and diagnostics (i.e. CBC, Chemistry and potentially x-rays and ultrasound if needed).
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