Below are three binary ciphertexts resulting from encrypting three ASCIl$-$encoded plaintexts with a stream cipher, all with the same stream cipher key. Your goal is to decrypt the first character of the last ciphertext $($C$3).1)$ Demonstrate your steps to derive the decrypted character. $2)$ Explain why we have to use a one$-$time pad for encryption. Ciphertext$1$: $11011111...$ Ciphertext$2$: $10100111...$ Ciphertext$3$: $10001111...$