This question seems to have been typed incorrectly. I think it should be "If Team C wins the first place, how many points can it lose to Team B at most?"
In this case, the answer is: Team A's total score is 25+22=47 points; Team b has scored 20 points; Team c scored 27 points at this time.
If Team C wants to win the first place, then Team C must score at least 47-27=20 points (at this time, Team A and Team C are tied for the first place, without adding 1 point). Team B will score at most 47-20- 1=26 points (the highest score of team B must be lower than that of team C), then team C will lose at most 26-20=6 points.
(3) Based on the previous question, this is relatively simple. Team B won the first place with the lowest score of 47, followed by team B with the lowest score of 27. If team C scores at most 47-27- 1= 19, then team B must win at least 27- 19=8.
It is possible. In the next match, if the score between Team B and Team C is 25: 20, then the total score of Team C is 27+20=47, and then Team C and Team A are tied for the first place.
⑤ Impossible, because the three teams tied for 47 points, then the score of the next game between Team B and Team C must be (47-20): (47-27) = 27: 20. According to the rules of the game, when Team B scored 5 points, the game ended, so this will not happen.
Some places still need to be understood by yourself, and they are not very detailed. I hope you can understand them.