What is the first step before setting up entitlements?

Universal Containers wants to create a Job Application custom object related to a Job Posting custom object. They would also like a no-code solution to calculate the number of Job Applications for each Job Posting.
What type of field should an administrator create on the Job Application to enable this functionality?

Universal Containers has set up a picklist dependency between region and zone on the Account object. The sales manager has requested that when a user selects a region, a zone must also be selected.
How should this be achieved?

A sales manager would like access to the following information:
All closed/won opportunities in the last six months for each account the manager owns.
All cases created within the last six months for each account the manager owns.
How can the administrator meet these requirements?

Cloud Kicks call center agents have given their manager feedback that It takes too long to find relevant articles to answer questions on customer cases. The call center manager has asked the administrator to improve suggestions displayed to agents in the Knowledge component on Cases.
Which setting should the administrator use to meet the requirement?