After locking the specific layers:
Double click the Magic Wand Tool, check Fill Color and set a tolerance number (12)
Click the skin color of a person
From the Color Panel, choose the HSB slider and change the color
So I've run into the same problem. What you need to do, first of all is check this website out:
Than when exporting from illustrator make sure you use the "save as" option not export. Because in export you will not find those options (at least I didn't).
When I saved it with "...
The case is already solved with a tangent drawing extension. Actually in this special case the tangents can be drawn also without that extension. They are as long as the line between the circle midpoints and they can be made by duplicating that connection line. Placing them properly with snapping happens when one draws a 90 degrees rotated copy of the line. ...
I think I'd use the InkTan extension to generate the outline. Still needs a bit of path joining afterwards, but it will be exact by default.
To turn these three objects into a single one, connect the ends of the tangents with new segments, so they form a rectangle, then do Path > Union with all three objects.
Make sure the circles are aligned either vertically or horizontally, then draw a rectangle between them, ensuring that the size matches and that it ends at the centers of both circles. Then merge with the pathfinder tool and rotate/recolor as needed.
If it is acceptable to place the two circles either vertically or horizontally to perform the creation, then rotate the creation, the process is straightforward.
Use the align feature for placement. Convert the circles to paths (Path, Object to Path) and break the nodes for both circles at the diameter. Delete the semi-circles that are no longer needed. Add ...
The TL:DR; solution to this is to use Inkscape:
It's free, open source, cross platform. You can install on Ubuntu with "snap install inkscape" or use the installer on the website for PC and Mac.
If you have the Adobe suite (and there's a 30 day free trial) you can use either Photoshop paths or Illustrator to import, edit and export ...