The First part of the questionbwas already sloved .

Step 2: The input after IP will be spilt into two parts: left 32-bit and right 32-bit, and the right 32-bit R will be encrypted by function f with round key K1 (that is EOBE6E662267 in this lab) as shown below Swapper LI 32 bits Mixer 32 bits. LI-1 32 bits RI-1 f(R1-1, K1) KI Each round RI 32 bits