The following is based on your practice database, that you created during week $2.$ After reading instructions, complete required steps:

$1.$ Create a file called index.php that will act as the entry point for our application. This file should:

$-$ Establish a database connection to the practice database on localhost.

$-$ Determine which controller to load based on the request URL.

$-$ Call the appropriate method on the controller based on the request URL.

$-$ Output the result of the method to the browser.

$2.$ Create a file called controllers$/$list$\_$customers.php$.$ This file should:

$-$ Define a function called list$\_$customers$()$ that retrieves all customers from the customers table and returns them as an array.

$-$ Load the views$/$list$\_$customers.php file and pass the array of customers to it$.$

$3.$ Create a file called controllers$/$add$\_$customer.php$.$ This file should:

$-$ Define a function called add$\_$customer$()$ that retrieves the customer data from the POST request and inserts it into the customers table.

$-$ Redirect the user to the list$\_$customers.php page.

$4.$ Create a file called views$/$list$\_$customers.php$.$ This file should:

$-$ Loop through the array of customers passed to it and display their information in a table.

$5.$ Create a file called views$/$add$\_$customer.php$.$ This file should:

$-$ Display a form that allows the user to enter the customer's information and submit it to the add$\_$customer$()$ function in the controllers$/$add$\_$customer.php file.