Write the answer in a maximum of 5 lines

Both Zainab and Ahmad trust each other and are using the Asymmetric (Public-key) encryption to protect the confidentiality of their messages. Assuming that a Hacker have access to their communication, for each of the case below describe, in no more than 3-5 lines, what could go wrong or what problem could arise, if Zainab wants to send a confidential message to Ahmad and encrypts it with: 1. Her private key 2. Her public key 3. Ahmad's private key M 1