Problem 1a. Using the original plaintext below in bold quotes (e.g. use only alphabet characters, a-z), write a program to encrypt plaintext into ciphertext using the Caesar cipher. If he had anything confidential to say, he wrote it in cipher, that is, by so changing the order of the letters of the alphabet, that not a word could be made out. Getting started: 1. Define the shift value i.e., the number of positions we want to shift from each character. 2. Iterate over each character of the plain text: 1. If the character is alphabet: 1. Calculate the position/index of the character in the 0-25 range. 2. Perform the positive shift using the modulo operation. 3. Find the character at the new position. 4. Replace the current capital letter by this new character. 2. Else, If the character is not alphabet, ignore the character, and move to the next position in the plaintext. with no change.

Problem 1b. Using the ciphertext you generated from Problem 1a, write a program to decrypt ciphertext into plaintext using the Caesar cipher.