Hi
most guide I read ,include here.tell me to solve th puzzle,the best way is upgrade all tech and bring my villager to every parts.different villager see different things

my question, if I have a villager that mastered in 5 skills, do only bring him everywhere is enough? Do he can see everything other can see since he mastered in 5 skill?

And how do I know wheter my villager mastered in 5 skill or not?because after mastered 3 skill,they become elders. I cant see the rest 2skill mastered already or not, since adept who almost be master is simmilar with master according to blue bar..