Trick 7.

Tricks AB, 2
YZ, 5
7. B Z A Y↷
8♥ A♥ 4♥ 3♥

Trick 8.

Tricks AB, 2
YZ, 6
8. B Z↷ A Y
3♦ A♦ 4♦ 5♦

Trick 9.

Tricks AB, 2
YZ, 7
9. B Z↷ A Y
7♦ Knv♦ 2♣ 9♦