Es6箭头功能＆＃39;这个＆＃39;在一个对象

Question

我有以下代码，我循环遍历一个对象并显示其属性值，或者如果它是一个函数则调用该值。

 let person = {
  fname: "Joseph",
  lname: "Michuki",
  age: 22,
  profession: "developer",
  address: "10105550-81 Othaya",
  fullname: () => this.fname + " " + this.lname
};

for(i in person){
    if(typeof person[i] === 'function'){
        console.log(person[i]()); // this logs undefined since the value of this defaults to window which has no fname or lname variables
        console.log(person.i); //this results in a type error since i is a string and not a function
        console.log(person[i].call(person)); //this logs undefined undefined since the 'this' passed is ignored
    }else {
        console.log(person[i]);
    }
}

我的问题是，我如何参考＆＃39;姓名＆＃39;循环中person对象的功能，以便记录正确的值？ 谢谢。