Question: Assume Alice is using the ElGamal cryptosystem to securely send a message to Bob. Given a prime number q = 2 3 , the generator

Assume Alice is using the ElGamal cryptosystem to securely send a message to Bob. Given a prime number q=23, the generator is \alpha =5, the private key of Alice X_A=9, the random integer k =11 and the message is M =15, please generate the ciphertext (C1, C2).
Note: Please use the Square-and-Multiply algorithm when calculating modular exponentiation.

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