Question 10 Alice signs a document using the ElGamal signature algorithm. Here public parameters are p = 23, -5, and -17. She signs a document 1 and produces a signature (xi-21, (ri -17, s1 8)). She then signs a second document Z2 to produce a signature (T2-2, (r2-17, 82-21)). Unfortunately she reused the ephemeral key! Using the fact that the ephemeral key is the same for both signatures: 1. Provide the ephemeral key k 2. Provide Alice's public key d. 3. Forge Alice's signature for the document z3-11 using the ephemeral key kE = 3