How to get values from JsON response.

Hi,

I am trying to fetch record via linked-in api, it returns me data in Json format,  samle is given below:

{
  "numResults": 854,
  "people": {
    "_count": 25,
    "_start": 10,
    "_total": 110,
    "values": [
      {
        "firstName": "xyzz",
        "id": "wdd23e4wdf",
        "lastName": "acbb"
      },
      {
          "firstName": "xysz",
        "id": "fdarfwere",
        "lastName": "abc"
      }     
     
    ]
  }
}

Can some one help me that how can i fetch records values from it?

Thanks in Advance.