There is a 50-50 chance that the computer will either triple the amount you send to P2 (the computer), or turn it to 0.
Whatever amount P2 (the computer) receives, P2 (the computer) will then decide how much of it to send back to you.
P2 also knows about this 50-50 chance of the computer turning the investment into 0.If P2 (the computer) receives 0,
P2 will not know whether the computer turned your investment into 0, or whether you sent 0 to P2.
If P2 (the computer) receives some positive amount, P2 (the computer) will know that you sent one third of this amount and that
the computer tripled the amount you sent.