Thanks for reading through @mgaft1.

Well let's take a look at those technicalities.

1. For the first one: I never mentioned that the oxygen won't be sufficient, but I did talk about the oxygen tank just to point out the fact that they were already nearing their destination. Yeah, 2 light speed means they've journeyed for about (25-26) years, and even at that the oxygen mechanism was designed to last a min of 30yrs but I didn't give the exact, or did I?
   One of the reason I had to emphasize that was to paint the critical nature of what they got themselves into... What if plasdiet is not habitable or probably hostiles were more powerful than they anticipated.... Should they decide to flee, will the oxygen mechanism be enough to keep them alive for long?

2. I didn't mentioned they actually picked him based on the ancestry of his father and mother. I only pointed that out when I was talking about pictures of his parent in his possession. However, Lila too was on the ship, right? So I think I tried to avoid making the "lucky nine" stuff sound ingenuine and unrealistic. Hence, the permutations and combinations include both male and female. The presence of people of different profession on the ship I believe is enough to convince that they also did the math and made sure people of profession are onboard. The line- learning was no exempt is a proof.

3. Well, I didn't say 9 race but of course I didn't do enough justice to this part. I should have mentioned the number of races there is. In this case, fictitious number of race would apply: I'd say 18. Hence, the lucky nine survival mechanism will mean (18 x 9), 162 gets onboard. Preservation of the human race means a small sample of all that matters, so, the female won't be left behind, or would they?

However I really appreciate you reading through... It means a lot. I will effect the needed change immediately.