What is the correct opening bid with these cards?

AQ5 AK53 AJ5 AQ5

• 1 Heart
• 2NT

AKQ5 KQ82 AK3 J3

• 1 Heart
• 1 Spade
• 1NT
• 2NT

K5 KQ8AK10854 Q2

• 1 Diamond
• 1NT
• 2NT

  AK4 A3 J5 AKQ1086

  • 2 Clubs
  • 2NT

How do you respond to your partner's opening bid of 2NT?

8 K9864 9876 432

• Pass
• 3 Hearts
• 3NT

J87642 86354 92

• Pass
• 3 Spades
• 4 Spades

KJ84 Q752 65 732

• 3 Clubs
• 3 Hearts
• 3 Spades

Q 974 Q9874 J952

• 3 Diamonds
• 3NT