Handle Array without key

[TRandy]

[{

    "bio": "admin",

    "created_time": { "_seconds": 1709669408, "_nanoseconds": 149000000 },

    "Served": [

      "akim",

      "asaima",

      "rela",

      "Aois",

    ],

    "id": "11"

  }

]

1 -- how to know the number of elements served by id

2 -- how to extract the elements from in this form : 

11 , akim

11 , asaima

11, rela

11, Aois