Where is your public key stored on your computer?

Where is your private key stored on your computer?

How is it possible for someone to find out your private key?

If someone steals your laptop can they find out your private key?

Why do you exchange certificates when setting up secure communication?

In what ways is the PKI similar or different from the infrastructure for distributing:

electricity

water

gasoline

In what ways is a CA similar to the department of transportation $($DTOP$)$ for:

issuing a driver's license

revoking a driver's license