Plz someone help me🙏 to understand this object

Question

You are working on a Contact Manager app.
You have created the contact object constructor, which has two arguments, name and number.
You need to add a print() method to the object, which will output the contact data to the console in the following format: name: number
The given code declares two objects and calls their print() methods. Complete the code by defining the print() method for the objects.

function contact(name, number) {
this.name = name;
this.number = number;
}

var a = new contact("David", 12345);
var b = new contact("Amy", 987654321);
a.print();
b.print();

Answer 1

Add return statement to the function "contact ()"

Answer 2

Or add
this.print=()=>{
console.log( this.name +":",this.number);
}
After the this.number declaration

Answer 3

Tanx my man