creating a phone book in angular to display previous data

Hi Team

I need some help to create a phone book in Angular and i am allow do this on this page not separate page due to online IDE and its not Angular CLI.

"to create a simple form at the top that allows the user to enter in a first name, last name, and phone number and there should be a submit button. Once the submit button is pressed, the information should be displayed in a list below (automatically sorted by last name) along with all the previous information that was entered. This way the application can function as a simple phone book. When your application loads, the input fields (not the phone book list) should be prepopulated with the following values already:

First name = Coder
Last name = Byte
Phone = 8885559999"

// Code to do this on Angular

/ @ts-ignore
import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-area',
  template: `
    <div class="form-wrapper">
      <form>
        <div>
          <label for="firstName">First name</label>
          <input type="text" name="firstName" id="firstName" class="userFirstname">
        </div>
        <div>
          <label for="lastName">Last name</label>
          <input type="text" name="lastName" id="lastName" class="userLastname">
        </div>
        <div>
          <label for="phoneNumber">Phone number</label>
          <input type="tel" name="phoneNumber" id="phoneNumber" class="userPhone">
        </div>
        <div>
          <input type="submit" value="submit" class="submitButton">
        </div>
      </form>
    <div>
    <div class="informationTable">
      Table of contacts should go here...
    </div>`,
  styles: []
})

export class MainAppComponent implements OnInit {
  // code goes here
  ngOnInit() { 
    
  }
}