From my games

Question 1

Bid
Double
Pass
Jump bid
Pass
Cuebid

Answer 1

25+ points combined, game force
Bid No Trump with stoppers

Question 2

Bid, Pass
2 of lower suit, Pass
Rebid, Pass
???

Answer 2

With fit
- raise to 3 = 10-12 point, invite game
- bid game = 25+ points combined
- 4NT = Blackwood
Rebid own suit
- 3 level = 6+ cards, 10-12 points
New suit
- 2 of higher 3 or lower = 4+ cards, 5+ in previous suit, 10-12 points
Balanced hand
- 2NT = 10-12 points, game invite
- 3NT = 25+ points combined

Question 3

1 of a suit, 2-level preempt overcall,
???

Answer 3

With trump fit:
- Raise to 3 = 6-9 points
- Cuebid = game force
New suit:
- Negative double = 8+ points, support for unbid suits, 4+ cards in an unbid major (if only 1)
- 2 of an unbid suit = 5+ cards, game invite
- 3 of an unbid suit = 5+ cards, game force
Balanced hand
- 2NT = game invite