Limiting the Number and Size of Files

Hello,
I want to limit “number of files” and “file size” when uploading certain users (‘customer’) at once using WordPress media.
For example, a maximum of 3 files should be uploaded at a time, and each file should be a maximum of 5 mb.
In accordance with this scenario I solved the size issue but not the number of files. How can I limit the number of files?
I’ve looked at these resources for this, but they didn’t work. Some are old and obsolete, and some are left unanswered.

Source-1
Source-2
Source-3

My code:

function customer_limit_upload_size( $file ) {
     //Get current user    
     $user = wp_get_current_user(); 
	 //Obtaining the role 
	 $roles = ( array ) $user->roles; 
	 
    // Set the desired file size limit
    $file_size_limit = 1024; // 1MB in KB

    // exclude admins
    if ( ! current_user_can( 'manage_options' )  && $roles[0] === 'customer') {

        $current_size = $file['size'];
        $current_size = $current_size / 1024; //get size in KB

        if ( $current_size > $file_size_limit ) {
            $file['error'] = sprintf( __( 'ERROR: File size must be no more than 1 MB.' ), $file_size_limit );
        }

    }

    return $file;

}
add_filter ( 'wp_handle_upload_prefilter', 'customer_limit_upload_size', 10, 1 );