8 A passage of plaintext is encoded by using the Caesar cipher corresponding to a shift of 2 places followed by the Vigenere cipher with keyword ODE.
- The first letter in the plaintext passage is \(F\). Show that the first letter in the transmitted text is \(V\).
- The first four letters in the transmitted text are VFIU. What are the first four letters in the plaintext passage?
- The 800th letter in the transmitted text is \(W\). What is the 800th letter in the plaintext passage?