class Person {
    constructor(name, age) {
    this.name = name;
    this.age = age;}

    tellMyName() {console.log('I am ' + this.name);

    }
    tellMyAge() {console.log('I am ' + this.age + ' years old.');

    }
}

const Person1 = new Person('John',40);
const Person2 = new Person('Mary',35);

Person1.tellMyName(),Person1.tellMyAge()
Person2.tellMyName(),Person2.tellMyAge()