4.
Mickey should play the 
2 - second hand low -
to allow Minnie to win the trick cheaply with the 
J.
A, forgetting about second hand low,
Minnie will no longer be able to make a trick with the 
J.
2, Mickey can see that he has all the tricks so he should step in and take them. 
When you are the second player to the trick, you should generally play a low card. The idea is to leave it to partner, who is yet to play.
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5.
Choose card that you think Mickey should play. 
Q.
Q.
4.
Choose the card that you think Mickey should play.