Please answer this ASAP I need this in 45 min please.

Lets represent Caesar Cipher encryption can as shown below:

Plaintext = P, Ciphertext = C, Key = K, the letter at i^th position in plaintext = P_i , the letter at i^th position in ciphertext = C_i

For each P_i + K = C_i

Using the notation above, I would like to use a new encryption methodology. This time K is also a text, and each letter of K is represented with K_i and the numeric key value for K_i is the position of the letter in alphabet just like in the Caesar Cipher.

Using only this information, encrypt GOKHAN with your last name, and then decrypt the resulting ciphertext with the same key. Show your work (Only 5 points for just providing the correct ciphertext without showing me how).

Note: If your last name is longer than 6 characters, use the first 6 characters. If it is shorter than 6 characters, repeat your name until you have all 6 characters. For example, if your last name is KURT, your key will be KURTKU.

use this as the Lastname: PINADE