ответить на вопросы. Data and CRM

На английском языке
In your own words, why is CRM important? And what is Business Intelligence (3-4 complete sentences)
How does an application like Access compare to excel? at least two differences l ( 3-4 complete sentences )
Briefly explain how you see a hotel or hospitality based setting using an access data base in their CRM application. What kind of data would you recommend that they collect in the data base. (read up on what and access data base is) 4-5 sentences plus an example