The rail fence cipher represents a form of transposition encryption, where a plaintext (i.e., secret message) is written in a zigzag pattern on more than one line, which is referred to as a rail. More specifically, the plaintext is written downwards and diagonally on successive "rails" of an imaginary fence. When the bottom rail is reached, the remainder of the plaintext is written in the same way as above, but upwards. When the top rail is reached, the remainder of the plaintext is written downwards and diagonally again until the bottom rail is reached. Then, the remainder of the plaintext is written upwards and diagonally again until the bottom rail is reached. This pattern repeats until the whole plaintext is written out. To generate the ciphertext, the letters on the first rail are written. Then, those letters on the second rail are written, followed by those on the third rail, if any. This process repeats until those letters located at the last rail are written. 1. Consider the following plaintext message: WELCOME CSC 312 STUDENTS. Cipher this plaintext by writing it on a two-rail fence. Show the ciphertext. 2. Consider a three-rail fence. Show the ciphertext. 3. Consider a two-rail fence. Discuss how to decipher a ciphertext to generate the original plaintext. 4. Answer the same question above using a three-rail fence. 5. Assume you have the following ciphertext, which corresponds to a plaintext written on a two - rail fence: MFVRTSBETSAHYAOIEUJCIMT Recover the plaintext associated with this cyphertext