panoskagiou:
Please stop making duplicate postings of the same topic (and Title) to the Forums. This is creating a lot of confusion and extra work for our members. It is needless, silly, redundant, and serves only to confuse. If you don't know how to post queries, read the instructions or ask us.
Also, you are obviously a student and posting a simple, basic process question in the Simulation Forum - which doesn't apply to your query. That is why I have moved both threads to the Student Forum where this type of question belongs.
Now, please answer this question: which of the threads do you want me to delete?
Await your response.