Question 3 (more of a challenge actually than a question) :
-----BEGIN BITCOIN SIGNED MESSAGE-----
Tjho uijt nfttbhf: "Xf bsf bmm tbuptij fydfqu gps DTX" vtjoh uif tbnf beesftt J bn (1K7neh5scRzVIFOZey39XWXL7gtMqFpYAz)
-----BEGIN BITCOIN SIGNATURE-----
1J7mdg5rbQyUHENYdx39WVWK7fsLpEoXZy
IDt1vr8Ahx4Yt3Rm5zfvwbGIis7MrpSDNx8ev6inxMr+NB8CWOHoTPVeujlfYMpsW58Txp1scaxXY5WtNQhbS94=
-----END BITCOIN SIGNATURE-----
-----BEGIN BITCOIN SIGNED MESSAGE-----
Tjho uijt nfttbhf: "Xf bsf bmm tbuptij fydfqu gps DTX" vtjoh uif tbnf beesftt J bn (1K7neh5scRzVIFOZey39XWXL7gtMqFpYAz)
-----BEGIN BITCOIN SIGNATURE-----
Version: Bitcoin-qt (1.0)
Address: 3K1AAUvgrYNH6Syp5e1zjqAWpe3dapBUPS
IFTQanseMw7GHwJKUzka0CxEV5XaHy2xcm+CflZrxzmlVwaeamI++5SqHPTYXZCvN04J7BW7Sou7cdp+qj0eXFc=
-----END BITCOIN SIGNATURE-----