Explanation
The steps you should take to update Amelia's reporting structure in Genesys Cloud CX are to update her manager in her profile and let Genesys Cloud CX automatically update her place in the hierarchy. You can change a user's manager by editing their profile and selecting a new manager from a list of users. Genesys Cloud CX will then update the user's position in the organizational hierarchy based on their manager.
References: https://help.mypurecloud.com/articles/change-a-users-manager/
https://help.mypurecloud.com/articles/view-the-organizational-hierarchy/

Explanation
Number plan determines how many and which digits are necessary for call routing is a true statement. A number plan is a telecommunication scheme that assigns telephone numbers to subscribers and telephony endpoints in Genesys Cloud CX. A number plan can also define various aspects of call routing, such as:
* How many digits are required to dial a destination number
* Which digits are used to identify a country code, area code, or extension
* Which digits are used to access an outside line or an operator
* Which digits are used to indicate an emergency number or a special service A number plan can be added or modified based on the organizational requirements in Genesys Cloud CX. A number plan can also be tested with the call simulator tool in Genesys Cloud CX. References:
https://help.mypurecloud.com/articles/number-plan-information/
https://help.mypurecloud.com/articles/add-number-plan/
https://help.mypurecloud.com/articles/test-destination-phone-numbers-with-the-call-simulator/

Explanation
Queue is available under Routing container in Genesys Cloud CX Admin menu. Routing is a container that holds various features and functions related to routing interactions in Genesys Cloud CX, such as queues, flows, wrap-up codes, skills, etc. Administrators can access Routing by clicking Admin > Routing in Genesys Cloud CX window. References: https://help.mypurecloud.com/articles/routing-overview/
https://help.mypurecloud.com/articles/admin-menu-overview/