A validation rule can enforce data quality by preventing users from saving records that do not meet certain criteria. In this case, the validation rule can check if both the Sales Engineer and the Account Executive lookup fields are blank, and display an error message if so. This way, the director of sales can ensure that every opportunity has either a sales engineer or an account executive assigned to the deal. References: https://help.salesforce.com/s/articleView?id=sf.validation_rules_overview.htm &type=5

The field is being updated by a workflow field update is why records are being updated with data that violates the validation rule. A workflow field update is a way to automatically change the value of a field when a workflow rule evaluates to true. A workflow field update can bypass validation rules and other security controls when updating a field value, which can result in invalid data being stored in the record.

The Delete permission is missing on the user for Accounts is what is preventing the user from completing the merge. Merging accounts is a way to combine up to three duplicate accounts into one master record and update the related records accordingly. Merging accounts requires the Delete permission on accounts because merging accounts involves deleting the duplicate records and keeping only the master record.

A rich text component allows administrators to add custom text or images to a Lightning page. Conditional visibility allows administrators to control when a component is visible based on criteria such as field values or device type. By using these features, administrators can highlight Canadian customers as a potential challenge for fulfillment without modifying the page layout or creating a new record type. References: https://help.salesforce.com/articleView?id=sf.app_builder_components_rich_text.htm &type=5 https://help.salesforce.com/articleView?id=sf.app_builder_component_visibility.htm &type=5

VisualStudio Code is a recommended tool to make the change in the displayed text in one of the Lightning web components. VisualStudio Code is an integrated development environment (IDE) that supports Salesforce development tools such as Salesforce Extensions for Visual Studio Code, Salesforce CLI, and Lightning Web Components. You can use VisualStudio Code to create, edit, debug, and deploy Lightning web components and other Salesforce metadata. To make the change in the displayed text, you need to open the HTML file of the Lightning web component in VisualStudio Code and modify the text element accordingly. References: https://developer.salesforce.com/tools/vscode https://developer.salesforce.com/docs/component-library/documentation/en/lwc/lwc.create_components

The change can be made through the desktop site by using the Edit All button on the related list of products on the opportunity page. This button allows you to edit multiple products at once and change their price book entries. You cannot use this button on the mobile app, as it is not supported. You also cannot change the price book on the opportunity once it has products added to it, unless you remove all the products first. References: https://help.salesforce.com/s/articleView?id=sf.opportunity_products_edit.htm &type=5 https://help.salesforce.com/s/articleView?id=sf.opportunity_products_change_pricebook.htm &type=5

To restore the deleted Review records, you need to restore both the Account and Product master records from the Recycle Bin. A master-detail relationship is a type of relationship that links two objects together and enforces a parent-child relationship between them. A master-detail relationship affects the security and deletion of the child records. If you delete a master record, all of its detail and subdetail records are deleted as well and moved to the Recycle Bin. To restore a detail or subdetail record, you must first restore its parent record. References: https://help.salesforce.com/s/articleView?id=sf.relationships_considerations.htm &type=5 https://help.salesforce.com/s/articleView?id=sf.recyclebin_overview.htm &type=5