text: function Vehicle(make, model, year, color) {
      this.make = make;
      this.model = model;
      this.year = year;
      this.color = color;
  }
  
  var vehicle1 = new Vehicle("AUDI", "A8", "2011", "GREY");
  
  console.log(Object.keys(vehicle1));
  
  console.log(Object.values(vehicle1));
  
  console.log(Object.entries(vehicle1));