The university computer lab's director keeps track of the lab usage, measured by the number of students using the lab. This particular function is very important for budgeting purposes. The computer lab director assigns you the task of developing a data warehouse in which to keep track of the lab usage statistics. The main requirements for this database are to: • Show the total number of users by different time periods. • Show usage numbers by time period, by major, and by student classification. • Compare usage for different major and different semesters. Use the Ch13_P1.mdb database, which includes the following tables: USELOG contains the student lab access data STUDENT is a dimension table containing student data given the three bulleted requirements and using the Ch13_P1.mdb data, complete Problems 1a?1g. a. Define the main facts to be analyzed. (Hint: These facts become the source for the design of the fact table.) b. Define and describe the possible dimensions. (Hint: These dimensions become the source for the design of the dimension tables.) c. Draw the lab usage star schema, using the fact and dimension structures you defined in Problems 1a and 1b. d. Define the attributes for each of the dimensions in Problem 1b. e. Recommend the appropriate attribute hierarchies. Having completed the preliminary work, we can now present the solutions to the seven problems: