Four secret messages for the holidays

Besides wishing you happy holidays, I want to give you some examples of encrypted messages.
Each decrypted message is a homework well done. So feel free to submit your responses to get extra credit.









1) SSB3aXNoIHlvdSBoYXBweSBob2xpZGF5cyBmb3IgeW91IGFuZCB5b3VyIGxvdmVk
IG9uZXMuCg==

2) Zkij te dej unfusj jee cksx veh renydw tqo. (spaces and symbols are preserved, substitution was used here).

3) Dye edaoiteeduexttsin u?  rperpt bs iovec nsoo d (transposition was used here).
Please note there may be two blank spaces, so let's print it again using monospaced charset:
Dye edaoiteeduexttsin u?  rperpt bs iovec nsoo d
................................................ 

4) psdo do qcvpsti tlqxbzt vy xvcvqzbsqwtpde ohwopdphpdvc whp psdo pdxt dp do cvp q eqtoqi edbsti (again this is just monoalphabetic substitution)

Please note this homework is no longer offered nor it will be marked any more.