4 Shift Cipher Consider the case where plaintext messages are only composed of upper case letters of the English alphabet, plus spaces. Therefore there are 27 different symbols to represent (26 letters and the space). Consider an encoding where A is 0, B is 1, ... , Z is 25, and the space is 26. Using the key k= 7 give the encoding of the following message using the shift cipher: STUDY FOR THE FINAL