Create a class called Person which accepts the name of a person as a string, and his/her age as a number. The Person class should have a method called describe which returns a string with the following syntax: "name, age years old". So for example, if John is 19 years old then the function describe of his object will return "John, 19 years old".

Write a JavaScript program to get the volume of a cylinder with four decimal places using object classes.

• Note: Volume of a cylinder : V = πr2h - r is the radius and h is the height of the cylinder.

Rewrite the following code to use the "class" syntax.

  function Clock({ template }) {
  
    let timer;
  
    function render() {
      let date = new Date();
  
      let hours = date.getHours();
      if (hours < 10) hours = '0' + hours;
  
      let mins = date.getMinutes();
      if (mins < 10) mins = '0' + mins;
  
      let secs = date.getSeconds();
      if (secs < 10) secs = '0' + secs;
  
      let output = template
        .replace('h', hours)
        .replace('m', mins)
        .replace('s', secs);
  
      console.log(output);
    }
  
    this.stop = function() {
      clearInterval(timer);
    };
  
    this.start = function() {
      render();
      timer = setInterval(render, 1000);
    };
  
  }
  
  let clock = new Clock({template: 'h:m:s'});
  clock.start();

• Create a TV class with properties like brand, channel and volume.
• Specify brand in a constructor parameter. Channel should be 1 by default. Volume should be 50 by default.
• Add methods to increase and decrease volume. Volume can't never be below 0 or above 100.
• Add a method to set the channel. Let's say the TV has only 50 channels so if you try to set channel 60 the TV will stay at the current channel.
• Add a method to reset TV so it goes back to channel 1 and volume 50. (Hint: consider using it from the constructor).
• It's useful to write a status, that returns info about the TV status like: "Panasonic at channel 8, volume 75".

Your task is to create a Circle constructor that creates a circle with a radius provided by an argument. The circles constructed must have two getters getArea() (PIr^2) and getPerimeter() (2PI*r) which give both respective areas and perimeter (circumference).

Look at the example of a Rectangle constructor which can help you in getting started.

class Rectangle {
  constructor(sideA,sideB){
    this.sideA = sideA;
    this.sideB = sideB;
  }
  getArea(){return this.sideA*this.sideB};
  getPerimeter(){return (this.sideA + this.sideB) *2 };
}

• Example:

let circ = new Circle(11);
circ.getArea();

// Should return 380.132711084365.

let circ = new Circle(4.44);
circ.getPerimeter();

// Should return  27.897342763877365