What is Asymmetric Key Cryptography and also explain the detailed working of Asymmetric Key Cryptography?

After reading the above notes you are able to answer the following questions?

1. What is Asymmetric key in cryptography?

2. What is the difference between Symmetric Key and Asymmetric Key Cryptography?

3. Explain in detail the working of Asymmetric Key Cryptography?

4. How to encrypt and decrypt the message using Public Key Cryptography?

5. How many asymmetric keys will be required if four devices are connected with each other in network?