The Vp of sales at universal con has requested the sales reps be given access to view all accounts in salesforce. However, they've also requested the sales rep only be allowed to create new opportunities on accounts they own

Cloud Kicks (CK) wants to set up a custom child object to track gift cards issued to a customer. A key requirement is to track the total number of gift cards opened and gift cards issued on an Account. CK wants to permanently ensure the gift cards are unable to be moved across any other Account once it is created.
On the gift card object, what type of field should be created to support this requirement?

Universal Containers would like to collaborate with its customers within Salesforce, and has decided to enable the "Allow Customer Invitations" Chatter Setting.
What permission is granted to Customers when invited to a Chatter Group?

Northern Trail Outfitters uses a custom object to track travel requests. Rangers want to have automatic posts on a record whenever a travel request has been approved.
Which feature should be used to accomplish this?

A new custom object called Invoices need to have an invoice date for the date and time itwas invoiced.
Which field type should be selected for this?