I never like to do art projects last minute but sometimes the night before a class is the only time you have free.
I still put a lot of pre-planning into the piece I have several graphite drawings and many dry erase/ mirror drawings the answer to problem 2.
At least 5 forms that are modular or repetitious, independent or combined to create one new whole shape. place on a 9x9x2 base of black mat foam core in proportion with the base. Bristol board forms made with good craftsmanship. the form(s) needed to be freestanding and any structural supports hidden.
I used repetition of rectangles. they were all 3/4" thick and were all measured in inches.
3x5x.75 Diagonal (technically it was a triangle but implied it was in the base.)
In critiques, no one really said anything about it.