Here is the hand:
Trick 1: ♠3, 6, 9, 10
Trick 2: ♠A, 2, 8, ♣3
Trick 3: ♠5, 4, Q, ♣4 [this is not the error that I was referring to above, but it was clearly not the best play available]
Trick 4: ♣2, Q, 6, 7
Trick 5: ♥J, Q, 3, 6
Trick 6: ♣J, 10, K, A
Trick 7: ♥10, 2, 4, K
Take it from here with the lead in the North hand.