Explanation:

In Microsoft Sentinel , different built-in roles provide access at varying levels of capability, following the principle of least privilege .
* Microsoft Sentinel Responder
* Purpose: Designed for SOC analysts responsible for h andling and responding to incidents.
* Capabilities:
* View and investigate incidents.
* Assign incidents , dismiss incidents , and change incident statuses .
* Respond to alerts but cannot modify Sentinel configuration or analytics rules .
* # This matches the requirem ents for User1 , who needs to dismiss and assign incidents .
* Microsoft Sentinel Contributor
* Purpose: Intended for security engineers or Sentinel administrators .
* Capabilities:
* Create, edit, and delete analytics rules , workbooks , hunting queries , and automation rules .
* Manage data connectors and configuration.
* Cannot assign permissions but can change Sentinel resources.
* # This matches the requirements for User2 , who must be able to modify analytics rules .
Other roles for reference:
* Microsoft Sentinel Re ader: View-only permissions.
* Microsoft Sentinel Automation Contributor: Allows playbook and automation editing.
* Contributor/Reader: General Azure roles, not Sentinel-specific.