I deploy an mysql pod to my k8s. this is the config, I am confused about the ports, like that:

kind: Deployment
...
   containers:
     - ports:
        - containerPort: 3306  # @1
---

apiVersion: v1
kind: Service 
metadata:
  name: mysql
  labels:
    app: mysql
spec:
  selector:
    app: mysql

  # way 1
  ports:
    - port: 3306  # @2

      targetPort: 3306  # @3

  # way 2
  type: NodePort
  ports: 
    - port: 3306
      targetPort: 3306
      nodePort: 30600

@question1. who proxy this port @question2. what is this port ? I mean container has exposed the port 3306, and the service exposed also. In my single node, These don't clash? @question3. this port is mean to the port the container exposed?

question4: when I deploy this with way 1. how can I visit my mysql server From pods & my localMachine .

question5: when I deploy this with way 2.how can I visit my mysql server From pods & my localMachine .