To give the marketing analyst access to all tracking data but no send activities, the admin should apply the Analyst and Marketing Cloud Viewer default user roles. The Analyst role allows the user to view tracking data, reports, and dashboards for all channels. The Marketing Cloud Viewer role allows the user to view content, subscribers, and data extensions, but not modify or send them

To assign users to specific business units in Salesforce Marketing Cloud, an admin can manage this directly through the user configuration settings:
Search for the individual user: Navigate to the Users section in Setup.
Select their name and click Edit Business Units: This action allows the admin to manage the business units that the user has access to, enabling or disabling access as required for the new or existing business units.
Reference: Salesforce Marketing Cloud User Management

To append UTM tracking parameters to links in emails:
Use Parameter Manager: This functionality within Marketing Cloud allows for the addition of UTM parameters to links across emails systematically. It provides a centralized control over tracking parameters, making it easy to manage and apply consistent tracking across various campaigns.
Configuration: Set up the UTM parameters in the Parameter Manager and these will be automatically appended to all links in the emails sent.
Reference: Salesforce Marketing Cloud Parameter Manager