Four-player game over several rounds with points/money exchanged per round

CAT has tested this idea 11 times across 2 papers, from 2020 to 2022. Solve one, and the others are the same method with different numbers or wording, which is why repeated concepts are the most efficient thing to practise.

Question	What it asks	Answer
CAT 2020 Slot 3 · DILR Q7	Hi-Lo bids over six rounds, payoffs by number bidding Hi	C
CAT 2020 Slot 3 · DILR Q8	Hi-Lo bids over six rounds, payoffs by number bidding Hi	4
CAT 2020 Slot 3 · DILR Q9	Hi-Lo bids over six rounds, payoffs by number bidding Hi	4
CAT 2020 Slot 3 · DILR Q10	Hi-Lo bids over six rounds, payoffs by number bidding Hi	2
CAT 2020 Slot 3 · DILR Q11	Hi-Lo bids over six rounds, payoffs by number bidding Hi	1
CAT 2020 Slot 3 · DILR Q12	Hi-Lo bids over six rounds, payoffs by number bidding Hi	A
CAT 2022 Slot 3 · DILR Q6	Four players form pairs over eight rounds, money exchanged	A
CAT 2022 Slot 3 · DILR Q7	Four players form pairs over eight rounds, money exchanged	A
CAT 2022 Slot 3 · DILR Q8	Four players form pairs over eight rounds, money exchanged	6
CAT 2022 Slot 3 · DILR Q9	Four players form pairs over eight rounds, money exchanged	6
CAT 2022 Slot 3 · DILR Q10	Four players form pairs over eight rounds, money exchanged	C

Part of Games & Tournaments (29 questions since 2017).