Answer

gistfile1.txt

array Persons = [
  {
 Person: { 
   {
     id: 0,
     name: "Kirk" ,
     manager: null
   },
   {
    id: 1,
    name: "Mark" ,
    manager: "Kirk"
  },
  {
    id: 2,
    name: "Tom" ,
    manager: "Mark"
  },
  {
    id: 3,
    name: "Nick" ,
    manager: "Tom"
  },
  {
    id: 4,
    name: "Ben" ,
    manager: "Tom"
  },
  {
    id: 5,
    name: "Stacey" ,
    manager: "Nick"
  },
  {
    id: 6,
    name: "Corey" ,
    manager: "Nick"
  },
  {
    id: 7,
    name: "David" ,
    manager: "Ben" 
  },
  {
    id: 8,
    name: "Tom" ,
    manager: "Stacey"
  },
  {
    id: 9,
    name: "Julie" ,
    manager: "Stacey"
  }
 }
];
 function generateTree(Persons) {
    var employees = JSON.parse(Persons) 
    return employees;
 };
    

function PersonTreeNode(employees){
  var ceo = employees.Person.reduce(let i=0; if i<1 i++ && person.manager= null){
  }
  return ceo; 
};