From the AWS Console get the public_ip_address of the Ansible Control Server
SSH to the Ansible Control Server using the supplied key - cosimo2018.pem or cosimo2018.ppk

sudo su
cd /etc/ansible
ansible-playbook play_install_website.yml

Note: Please give another 10 mins even after the ansible shows as tasks completed.

From the AWS Console get the public_ip_address of the new server created by Name: Web Server
http://<public_ip_address>/install

Database Username = root
Database Name = cosimo2018
Database Username Password = 2/XzS6atdd=h
Email = <your_email>