100 XEM for the fastest one (it should be easy).
Below the QR code with the private key to the account:
The QR code is protected by a password (The fastest way to import it using a mobile wallet). The password is the answer to the question:
Like each of us (I hope) know in NEM a message can be attached to the transaction (up to 1024 bytes).
What was the first ever message sent on the NEM network?