My initial thoughts, none of which I have any confidence will be retained by 01/10/2021.
Problem A: 5
On this auction, I think that partner's pass of 5
has to be a forcing pass. Partner was sniffing at slam when all he knew about was 7 hearts. I may not have any aces, but I do have a defensive trick. The question is whether to cue the diamond king or double; I think should show that I have something outside of hearts.
Problem B: Pass I am torn between taking another move or giving up. I have a max for my bidding and good three card support, but 11 tricks is a lot for the diamond game and 9xxxx is not much of a stop in the opponents suit. A cue bid might get partner to show a club honor for 3NT, but feels hefty for 9 HCPs. I think I will just pass with the intent to compete.
Problem C: 2
This looks to be a misfit hand, so unless I hear something more promising, I am going low. I have a 6th heart, but no spots, only doubleton support in diamonds ,tripleton support in spades, and Qx in clubs, so nothing is appealing.
Problem D: 2
If one of my round suit cards were a diamond, I might have bid double. If I had five diamonds along with five in either hearts or clubs, I might have tried Michaels or Unusual NT. I don't, so I overcall and await further development.
Problem E: 3NT I have eight tricks on a club lead. Perhaps partner has one, to fulfill my NT game, perhaps partner has five or more in a major to try a different vein, perhaps we are just sucking wind. It is matchpoints, and 3NT is my best guess for a game after the preempt.
Problem F: 1
I hate opening this, but spades is a wonderful lead director, the hand has a lot of offensive potential, and it is my turn to bid.
Problem G: 2
I have too many points to pass this out, but my suit is horrible - no lead direction potential because all my points are elsewhere. I have to do something, so I think this is better than double.
Problem H:
A Have I mentioned lately that I hate to lead? The only reason to double is that I think we have a game, but do not have a slam and do not think that we can make 5NT. We have a double fit, so they probably do also. I think we need to take our tricks before they disappear on the diamonds. If I thought this would be a cross ruff, I would lead a trump. Hopefully, if I am wrong, leading an ace willgive me a chance to switch gears.