Hi,
I hope you haven't been too confused by the responses for 3D object creation? Very good responses but maybe bigger than you are shooting for.
Please correct me if I'm wrong but this appears to be a 2D assignment whereby you must use concepts of projection to develop the appropriate section views.
One response suggested that this is an assignment so we should all be careful not to perform the work so here's my input without doing the work.
Cutting plane line A-A in the top view of your orthographic projection cuts horizontally through the entire width of the part (full section) and passes through two holes. The left hole has a countersink at the top and the right hole is just a through hole that passes through a lower level of the part.
Cutting plane B-B cuts vertically through the same countersunk hole and then through the counterbored hole.
Cutting plane C-C cuts vertically through the small through hole and a larger through hole.
Lots of terms used there but a good study of print reading will help you with those and with the concepts of orthographic projection and section views (full, aligned, jogged, etc...).
I placed an image below that should help you visualize the sections that need completed. I think your instructor wants you to add the necessary lines and hatches to complete each view.
Cheers, Blaine

Blaine Young
Senior Engineering Technician, US Army
