cryptography course i need answer for these quation

Task B: The development of Cryptographic schemes. The development of cryptographic algorithms faces a variety of unique challenges. Over time, we'v leamed that re don't always have great instincts about what is secure and what isn't. The history o cryptography is filled with instances of cryptosystems that were once believed to be quite secure bur were subsequently found to be completely insecure. Adding the following to your plan will reinforce the content and the knowledge of your trainees: 6. Negotiate popular public key cryptography techniques and their applications. 7. Interpret in detail about public key exchange and digital signatures along with any implementation problems. Use examples to back up your claims. 8. Assess in detail the Public Key Infrastructure (PKI) and provide examples. 9. Interact and clarify the most common attacks on the most widely used public-key encryption schemes. 10. Explore the development of Key Encapsulation Mechanisms (KEMs) and the security of hybrid ciphers. 11. A system has proven security in cryptography if its security needs can be properly described in an adversarial model. A. Make clear the provable security in signature and encryption techniques using examples. B. Assess and review several interpretations of verifiable security