Closures of function-object constructors. Fix this code or Elaborate this code

Question

//basic code
let person = new Function("a","b","return a+b");
console.log("Non-Error: "+person(1,2));//3

//own code
let personA = new Function("a","b","return ()=>a+b");
console.log("Error 1: "+personA(1,2));//Error 1:()=> a+b

//own method
let createperson = new Function("name","age",
"return function(){ let user = {};user.name=name;user.age=age;return user;}");
console.log("Error 2: "+createperson.name);
//Error 1:anonymous

Answer 1

According to the code
Error 1 : ()=> a+b;
I think it's returns a string of method which is function defined in an object