[VE][html5] Add Subject Here

Hi there,

I tried validating the page and its giving me error on <input type="tel"
name="phonenumber" id="phonenumber" size="10" required="required"/>
The whole page as around 34 errors?

Can you please reply asap?

Thanks and Regards

Karan
Validating
https://mercury.ict.swin.edu.au/cos60004/s4905474/assign1/register.html
Error [html5]: ""