Full answer please

Determine the type of encryption that was used for encrypting the following three groups of messages (using knowledge gained in Week 2). The possible types are shift cipher (such as, Ceasar's cipher), substitution cipher and Vigenre. For each pair of plaintext and ciphertext, determine the method of encryption used and write down the key that was used for that method. 1. Plaintext: NEVERTRUSTINSECURITYBYOBSCURITY Ciphertext: ARIREGEHFGVAFRPHEVGLOLBOFPHEVGL 2. Plaintext: THISISASECRETMESSAGE Ciphertext: GSRHRHZHVXIVGNVHHZTV 3. Plaintext: GOOD Ciphertext: OVUA