1a) Partner's lead is a bit funny, the Jack without holding JT9 or JT8. Could be from ♣JTx (declarer has three clubs, hence three club tricks now via a finesse) or ♣JTxxx (declarer has a singleton). I'll win the King. 1b) I'd guess to return a heart 2) After 1♠-2♥ is South allowed to raise with only three hearts, and if so, is a raise to 3♥ forcing? I think if South can support hearts at any points then you'd get to slam via 5♥ from North. 3) My first thought was RKCB as North, but we could be missing a club control so other people's suggestions of a 5♦ cue bid are better. Only problem is never asking about aces we might miss 7♥.