Which relationship can be selected in a custom report type where Accounts is the primary object and Contacts is the related object?

Ursa Major Solar uses data from the grand total of a custom report to create their dashboard. Which two components will populate the grand total properly?
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Northern TVail Outfitters wants to track ROI for contacts that are key stakeholders for opportunities. The VP of sales requested that this information be accessible on the opportunity and available for reporting.
Which two options should the administrator configure to meet these requirements?
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Ursa Major wants to add charts to a Salesforce dashboard.
What are three standard chart types that are available?
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Ursa Major Solar's default, organization-wide sharing for accounts is set to public read/write. The administrator needs to ensure that marketing never modifies an account record.
Which action should the administrator take to accomplish this goal?