Dynamic loop and merge block using panel data json file

Hi,

I have a requirement, where a survey is sent out to employees, and the employee will answer the same set of questions regarding each of their employees. The employers have a different number of employees, but the same questions will be asked about each employee.

1. Staff member 1

Is this staff member a good employee? Y/N
Does this staff member require training?
Who is the staff member's supervisor?

1. Staff member 2

etc based on a dynamic json file.

My question is, how do I parse this dynamics JSON file, which will be uploaded to the panel data as a field. into the Loop and merge data?
a sample JSON file is here,
{"items": [{"index": 1,
"name": "Nina",
"surname": "Underwood",
"email": "lillian@raynor.nf",
"bool": false
},
{"index": 2,
"name": "Chris",
"surname": "Baker",
"email": "jimmy@hirsch.mt",
"bool": true
},
{"index": 3,
"name": "Melinda",
"surname": "Sanchez",
"email": "brent@greenberg.sx",
"bool": true
}
]
}