For each of the following examples, indicate whether the data is structured, semistructured, unstructured, or a mix of each. Explain your answer.

1. A company runs many social media campaigns to increase sales. The company collects data about the amount spent on each ad campaign, the number of people who click on each ad, whether each person clicking on an ad completed a purchase, and the location (city and country) of each person who clicked on an ad.

2. A company performs performance evaluations of all its employees each quarter. The evaluations include comments made by peers of each employee, a supervisor's writeup of performance during the quarter with a rating on a 5-point scale, and performance metrics relative to their job title (e.g., sales completed for sales people, units repaired for repair people, etc.).

3. A call center records all phone calls between employees and customers. The company stores the data for review if any allegations are made of inappropriate employee behavior.

4. A company scrapes data from a review website where customers can write in about products they have purchased. The company analyzes each of the reviews but only records the number of words in the review, a rating of the tone of the review (scores from -3 to +3), and the number of stars given (1 to 4).

5. A university tracks student's course registrations each semester. The university records the course number, course description, and course credit hours for each student.

6. A mechanic keeps a digital catalog of all part numbers and part descriptions for each type of vehicle the company services.

7. A non-profit organization keeps a record of all past donors. The organization tracks names, dates of donations, amount donated, and additional comments about the donor and their donation.

8. An online retailer tracks IP addresses from each web visit. The retailer monitors IP addresses to see if visits are coming from IP addresses known to hack company websites.

9. A company scrapes data from a review website where customers can write in about products they have purchased. The company stores each of the written reviews.

10. A company owns a football stadium. During games, the company takes high-definition photos of all fans. The company stores these images and plans eventually to use advanced technologies to see which fans wear the team's colors so they can market clothing to them.