What should the account owner at Get Cloudy Consulting use to learn the sum of the amount for each opportunity?

A sales manager at Get Cloudy Consulting wants a report that shows their top-selling product families by quantity.

A Salesforce associate is working from a custom Contact list view and noticed key information is missing.
What should they do to add the missing information?

An online retail company uses Sales Cloud and Marketing Cloud. The company's Salesforce associate needs help while working in Marketing Cloud and wants to hear other Salesforce professionals' opinions. They would like to post a question that anyone around the globe who is familiar with Salesforce can answer.
Which resource should they use?

A salesforce associate at Get cloudy Consulting is configuring object access. The requirements are:
Sales Manager must have the same access to Opportunities.
Marketing managers must have the same access to Campaigns.
What is the recommend approach to configuring their access?