' Encrypt the message WATCH YOUR STEP by translating the letters…

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Step 1: Python Code: def letter_to_number(letter): return ord(letter) - ord('A') def number_to_letter(number): return chr(number + ord('A')) def encrypt_message(message): encrypted_message = "" for letter in message: if letter.isalpha(): # Only encrypt alphabetic characters number = letter_to_number(letter) encrypted_number = (-7 * number + 1) % 26 encrypted_letter = number_to_letter(encrypted_number) encrypted_message += encrypted_letter else: encrypted_message += letter # Keep non-alphabetic characters as they are return encrypted_message message = "WATCH YOUR STEP" encrypted_message = encrypt_message(message) print(f"Original Message: {message}") print(f"Encrypted Message: {encrypted_message}") Explanation: This Python code is designed to encrypt a given message using a specific mathematical function. The process involves three main functions: letter_to_number , number_to_letter , and encrypt_message . The letter_to_number function converts each letter to its corresponding position in the alphabet (e.g., A = 0, B = 1). The number_to_letter function reverses this process, converting a numerical position back to its corresponding letter. The encrypt_message function applies the encryption function f ( p ) = ( − 7 p + 1 ) m o d 26 f(p) = (-7p + 1) \mod 26 f ( p ) = ( − 7 p + 1 ) mod 26 to each letter in the message, transforming it into a new letter. This function also ensures that only alphabetic characters are encrypted, leaving spaces and punctuation unchanged. The final result is an encrypted message that is printed alongside the original input. For example, the message "WATCH YOUR STEP" is encrypted to "DBYNE PHRM FYZA". Step 2: Output of above code: Original Message: WATCH YOUR STEP Encrypted Message: DBYNE PHRM FYZA === Code Execution Successful === Explanation: The Python code provided successfully encrypts the original message "WATCH YOUR STEP" into the encrypted message "DBYNE PHRM FYZA". This is achieved through a series of well-defined steps. Initially, each letter in the message is converted to its corresponding position in the alphabet (e.g., W = 22, A = 0, etc.). The encryption function f ( p ) = ( − 7 p + 1 ) m o d 26 f(p) = (-7p + 1) \mod 26  is then applied to each numeric position, transforming it into a new number. This new number is subsequently converted back into a letter. Non-alphabetic characters, such as spaces, remain unchanged throughout the process. The code iterates over each character of the input message, applies the encryption, and assembles the final encrypted message, which is displayed alongside the original message. The output verifies that the encryption process was executed successfully, transforming "WATCH YOUR STEP" into "DBYNE PHRM FYZA". Final Answer: The Python code encrypts the original message "WATCH YOUR STEP" into "DBYNE PHRM FYZA". It converts each letter to its numeric position, applies the encryption function f ( p ) = ( − 7 p + 1 ) m o d 26 f(p) = (-7p + 1) \mod 26 , and converts the result back to letters, leaving non-alphabetic characters unchanged. The successful execution is confirmed by the output.

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