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//Using Object.create 

const personPrototypes = {
  greeting: function(){
    return `Hello there ${this.firstName} ${this.lastName}!`;
  },
  getsMarried: function(newLastName){
    this.lastName = newLastName;
  }
}

const mary =  Object.create(personPrototypes);
mary.firstName = 'Mary';
mary.lastName = 'Williams';
mary.age = 30;

mary.getsMarried('Thompson');

console.log(mary.greeting());

const brad = Object.create(personPrototypes, {
  firstName: {value: 'Brad'},
  lastName: {value: 'Traversy'},
  age: {value: 36}
});

console.log(brad);
console.log(brad.greeting());