Hi all, I am trying to find someone to do for me a mechanical design and I asked him for some designs and he told me about his output design files but I didn't understand what those files are so I need any help. The files names are 1- Industry design: a- Three ideas drawings, JPG files. b- Color schemes. c- Silk screen drawing. 2- Mechanical design: a- 3D drawing. b- 2D drawing. c- other technical files. I need to know the purpose of each file because he gave me his prices and time line but I can't really evaluate the price or the time. Please I need quick help.