1. We received the following ciphertext which was encoded with a shift cipher: Orubkiusvazkxyioktikgtjvxobgie Perform an attack against the cipher based on a letter frequency count. Your solution should contain a detailed explanation as to how you arrived at the solution. Compute the relative frequency of all letters A...Z in the ciphertext. You may want to use a tool such as the open-source program CrypTool (Cryptool Educational Tool for Cryptography and Cryptanalysis. https://www.cryptool.org/.) for this task. However, a paper and pencil approach is also still doable