ENV - Load balancer

Haproxy server : Ubuntu
Web server 1 : Ubuntu + wordpress + woocommerce
Web server 2 : Ubuntu + wordpress + woocommerce
Web server 3 : Ubuntu + wordpress + woocommerce
Database server : phpMyadmin

If this network have 100,000 view / Hrs. & Shoping in woocommerce.

Should I set spec each server?

What package should I choose for Web server?
What package should I choose for HAproxy server?
What package should I choose for Database server?