Clients liked the improvements to the social media application supported by the database from the second phase

Clients liked the improvements to the social media application supported by the database from the second phase. How useful the social media application depends, in part, on questions administrators at a client organization might be able to answer from inquiries against the database using reports or online queries. For each of the example client inquiries that follow, justify for your answer to part c whether your database could provide answers to that inquiry (if you already know SQL, you could provide justification by showing the appropriate SQL query; otherwise, explain the entities, attributes, and relationships from your ERD in part c that would be necessary to produce the desired result): • How many postings has each person created for each site? • Which postings appear under multiple sites? • Has any person created a posting and then responded to his or her own posting before any other person has read the original posting?