Answer:
Around seven billion people
You can try downloading some kind of computer cleaner like CleanMyMac X free version, also definitely restart your computer if you haven't done so already.
Question: <em>How would I copy this image?</em>
Answer: Either screenshot it, or CTRL C ± CTRL V it. To screenshot something, open 'snipping tool' and pull up the PDF, then box in whatever you are trying to copy. You can also reverse image search it to find it somewhere on the web.
Uplifting Note: To you, smiling at someone may mean nothing, but to them, it might be their whole world.
A window is a rectangular work area in the desk top that contains a program, text, files, it other data and tools.
Hope this helps!