Activity List: Task 1: Write a JAVA program that defines the Playfair variables which will be used in the algorithm. Write a function called "set_Matrix" that returns the Playfair matrix used for encryption. Task 2: Implement a method to encrypt a data sent by Bob to Alice using Playfair Cipher Algorithm. Task 3: Implement a method to decrypt a data received from a sender using Playfair Cipher Algorithm. Task 4: Apply this algorithm to encrypt "playfair" using as keyword: computer and verify that the encrypted word is: oqhphegb. Task 5: Based on CrypTool environment, Encrypt the plaintext why don't yous using the Playfair Cipher with matrix 55