Applied cryptography

Need Help with two simple Questions .
 1. Given a 64 bit plaintext FFFE 397D AC28 8855 and 48 bit Round key 4D77 32C5 29EF, perform one round DES encryption and decrypt the computed cipher retrieving the original input. 
2. Given a 56-bit key 88DF E9DC C277 CA, compute 48 bit Round1, Round2 and Round3 keys. 

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