Answer(১):- 1.Upwork.
2.Toptal.
3.Elance.
4.Freelancer.
5.Craigslist.
Answer(২):- 1.Guru
2.Upwork
3.Freelancer
4.Toptal
5.Crowded
Answer(৩):- 1.Toptal
2.Upwork
3.Flexjobs
4.Guru
5.Crowded.
Answer(৪):- Upwork, Toptal, Elance, Freelancer, craigslist, Guru, 99designs, Peopleperhour, Freelance Writing Gigs,Demand Media.