Solution :
Here, we need to perform JOIN operation of the students and registration.
Use NATURAL JOIN operator 
and so no need to specify Join condition.
Also we need to selection operator tp select only those course whose major in "philosophy".
Finally we projection operator π to project only distinct students name who took at least three courses.
![$\pi [\sigma_{\text{student's nam}e} [ \sigma(\text{three courses}) \Join \text{"Philosophy"}]]$](https://tex.z-dn.net/?f=%24%5Cpi%20%5B%5Csigma_%7B%5Ctext%7Bstudent%27s%20nam%7De%7D%20%5B%20%5Csigma%28%5Ctext%7Bthree%20courses%7D%29%20%5CJoin%20%5Ctext%7B%22Philosophy%22%7D%5D%5D%24)
The number of jobs in internet media is a lot when compare to the number of jobs in tv broadcasting and print media as people can now work remotely from home.
<h3>What is the role of media in entertainment?</h3>
The function of mass media in entertainment is mostly to get the people inform and also entertained.
Note that The number of jobs in internet media is increasing daily as people are creating a lot of content when compare to the number of jobs in tv broadcasting and print media as people can now work remotely from home.
Learn more about internet media from
brainly.com/question/13467876
#SPJ1
Answer:
(b) network
Explanation:
The Network Layer is the OSI Model's third layer. It is in charge of packet transport from source to destination or host to host across various networks. The layer receives data from the transport layer, adds a header to it, and sends it to the data link layer.
A virus can do many things from burn up your hard drive to just annoy you with ads. the best thing you can do if you think you have one is take it to a professional
