this is Crytopgraphy

Question 1

Question 2

that was a full question I already gave

just calculation manually

Retrieve the key and the whole plaintext when you received the following ciphertext: wswkbsfdbqurwibwtsfctjnws By chance, you also obtained some hints as follows: i. the sender uses simple substitution cipher to encrypt the plaintext. ii. the ciphertext represents seven words of plaintexts. iii. the key is of length 3 letters, and the second letter in the key is 'i that gives the last word in a plaintext as 'cat'. You also know that the encoder has removed the blanks between the ciphertext. The key and plaintext are meaningful English words/phrase. Show every working steps until you reach to the answer Alif sends a message to her friend Nadia. He encrypts his messages with a four-letter key (example of four letter key are 'home', 'fast', etc) that he shares with Nadia, and uses the key repeatedly to encrypt the message. You have intercepted the ciphertexts that represent four words, as follows: ACLHKRZXECIVG QKPA What is the key and the message that Alif sent? (Hint: When Sarah encrypts the word 'FOUR with the same key, the resulting ciphertexts will read 'HCLV)