Why everybody is still repeating same answer here? I think the first response already answers OP concern and if still not enough, the second and third should be suffice already. I suggest you locked this thread already, the locked button is on the lower left next to move topic. Thank you, so this thread wouldn't be spammed with same answers and response anymore.
Yes, the same answer with a different style. But I think they are not entirely wrong, given that the OP is asking things that should be known by someone who has many activities like him. Hopefully the OP can immediately understand because there are already many answers with full explanations.
Also, this should come to the attention of the OP at a later date, he must do a search before making a post, he must ascertain whether the question he will ask has existed or not, because I have seen many posts with the exactly question like this.