What is the storage of the Developer Pro Sandbox?

The Business analyst (BA) at Northern Outfitters (NTO) has gathered preliminary functional requirements for an upcoming Salesforce implementation project. Before translating these requirements into user stories, the BA wants to gain additional perspective, feedback, and detail on the requirements from the NTO team.
Which document should help the BA gather this information?

Universal Containers is transitioning to Slack as its internal communication tool and is ready to release.
What is the final step that a business analyst should perform during the user acceptance testing process that would ensure a "go" decision?

The project manager for a new project at Northern Trail Outfitters (NTO) wants the business analyst (BA) to obtain alignment on goals and strategies across NTO's organization, using NTO's documentation, the BA begins to understand NTO's strategies but needs more information.
Which methodology should help the BA obtain the required information?

One retail location of Cloud Kicks has been getting complaints from shoppers about being unable to find items in the store. The general manager has asked IT to configure tablets for the sales clerks so they can move freely around the store to assist customers.
The IT team writes a functional requirement:
* Tablets running the Salesforce mobile app must allow users to access store inventory records which include current item count and item location.
Which user story should the business analyst write to describe the functional requirement?