How many Aliases and Email accounts are available to Zoho One customers

How many Aliases and Email accounts are available to Zoho One customers

As the title states, we're Zoho One customers and there is no literature that explains the following inquiries;

  1. How email accounts are allowed to be created. Is it only 1 per user?
  2. How many aliases can be made from each email account?
  3. Are there costs for value-added features and what are they?