Explanation
To allow a user to add new Campaign Members or update Member statuses, the administrator should make sure that Marketing User Checkbox is checked on the user record page. This checkbox enables users to create, edit, and delete campaigns, configure advanced campaign setup, import leads, manage campaign members, and update campaign history via mass update. The checkbox also requires users to have Read and Edit permissions on campaigns and leads/contacts. Creating a permission set, providing access to both Leads and Contacts, or running a Campaign report will not enable users to manage Campaign Members. References:
https://help.salesforce.com/s/articleView?id=sf.campaigns_enable.htm&type=5

Explanation
Creating a dashboard with the running user set as someone who can see all opportunities is a way to create an enterprise-wide dashboard of all open opportunities in the pipeline without changing any sharing settings. The running user determines what data is displayed on the dashboard based on their access level and permissions; if the running user can see all opportunities, then the dashboard will show all opportunities regardless of who views it. Updating the dashboard folder settings to manager for the sales reps role does not create an enterprise-wide dashboard; it only controls who can access the dashboard folder, not what data is displayed on the dashboard. Adding a filter to the dashboard to filter the opportunities by owner role does not create an enterprise-wide dashboard either; it only shows opportunities owned by users in certain roles, not all opportunities. Building individual dashboards for profiles that need to see the enterprise results is not a feasible solution; it would require creating multiple dashboards for different profiles and maintaining them separately, which is inefficient and redundant. References:
https://help.salesforce.com/s/articleView?id=sf.dashboards_running_user.htm&type=5

Explanation
Expected revenue is calculated as Amount x Probability. If the expected revenue field displays incorrect values, it means that the probability associated with the stage is not accurate. The administrator should change the probability to reflect the actual likelihood of closing the opportunity at that stage. References:
https://help.salesforce.com/s/articleView?id=sf.forecasts3_expected_revenue.htm&type=5

Explanation
Role hierarchy and sharing rules are two features that should be used to open up access to Opportunity records for sales users working on collaborative deals. Role hierarchy can be used to grant access to records owned by or shared with users who are below them in the hierarchy. Sharing rules can be used to extend sharing access to users in public groups, roles, or territories based on certain criteria, such as record owner or field value.
References: https://help.salesforce.com/s/articleView?id=sf.admin_sharing.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.security_sharing_rules.htm&type=5

Explanation
A record type is a feature that allows administrators to offer different business processes, picklist values, page layouts, etc., to different users based on their profile or role. A page layout is a feature that allows administrators to control how fields, related lists, buttons, etc., are arranged on a record detail or edit page for each object. In this case, since Universal Containers has three separate lines of business with specific fields for each line; and since sales team needs different fields than service team; the administrator should create three record types for each line of business; and create two page layouts for each record type - one for sales team and one for service team. References:
https://help.salesforce.com/s/articleView?id=sf.customize_recordtype.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.customize_pagelayouts_overview.htm&type=5