I need to encrypt text using Rail fence, Playfair, and Vigenere ciphers. Full assignment directions are posted as an image below. Thanks in advance.

Written part: 1. Encrypt the text, "secured network", using the following ciphers: a. Rail fence with 3 rows. b. Playfair using the keyword LARGEST. C. Vigenre using "largest" as the key 2. First, calculate the determinant mod 26 of K below and show that it is relatively prime to 26. Then, do the math to show that K and K-1 are multiplicative inverses of each other modulo 26 by multiplying the two matrices. The result should be the 3 x 3 identity matrix. Afterwards, encrypt and decrypt the word "ibm" using the matrices. Please show all work for partial credit. 17 17 5 4 9 K = [21 18 21] and K-1[15 17 2 2 19 24 0 = 15 6] 17