Consider the following situations:I) A pitcher throws a fast ball;II) A pencil rests on your desk;III) A car hits a tree;IV) The wind pushes a sailboat.In which situation(s) do(es) a pair of equalforces acting in opposite directions exist?1. All of these2. II, III and IV only3. None of these4. II and IV only5. I and III only6. Another combination7. I and II only8. I, II and IV only9. I, III and IV only10. III and IV only017 1