How should you complete the relevant Windows PowerShell commands?

Explanation/Reference:
Explanation:
The Add-MailboxPermission is available in on-premises Exchange Server 2016 and in the cloud-based service. Some parameters and settings may be exclusive to one environment or the other.
Use the Add-MailboxPermission cmdlet to add permissions to a mailbox.It applies to Exchange Online and Exchange Server.
Example:
This example grants Kevin Kelly full access to Terry Adams’s mailbox.
Add-MailboxPermission -Identity “Terry Adams” -User KevinKelly -AccessRights FullAccess -InheritanceType All
References:
https://technet.microsoft.com/en-us/library/bb124097(v=exchg.160).aspx