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I'll try to answer all of these as best I can ... AFAIK, yes. For menopause to be a benificial survivial trait the species needs to be social enough and long-lived enoughed with a long enough juvenile period that it's better for grandma to help with her grandkids instead of giving birth again...

You are very wrong about menstruation and menopause. Both are actually quite rare among mammals. Only sixteen mammal species are known to have a menstrual cycle. Of those only two aren't primates or bats. The females of only three mammal species are known experience menopause: humans, killer...