Universal Containers needs their channel partners to collaborate on Opportunities within their new partner Community based on the Customer Service Template. What is the recommended way to accomplish this task?

Universal Containers recently launched a Lightning Community. Members can access articles and answer each other's questions. The company wants to make sure that the Community is providing a highly engaging experience for its members. How can the Administrator help measure of the engagement and adoption in the Community on an ongoing basis?
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Universal Containers needs to use capabilities in Salesforce Communities to enable Social Sign -on for their customers. What should the Salesforce Admin do to enable users to use their Social Sign -on?
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The Universal Containers marketing department has approved a digital experience concept. The CTO has specified that all pages must always load within two seconds and be supported by older browsers.
What underlying Community infrastructure should the Community Cloud consultant utilise to build the Community?
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Regional Containers have been developing their Partner Community, they have created all the required pages, content and have created all the Community users and relevant profiles they activated the Community 10 minutes ago, when were the Partner Users notified of their community login credentials?