#1 looks quite preppy the way it is styled. Maybe better as a set with the matching skirt, if you love it?
#2 dress appears quite casual, maybe not ideal for the chi-chi graduation!
#4 top + yellow pants, top + matching pleated skirt, and obi belt - ALL OF THIS IS PERFECT, any way you mix it up. I also see this set as ideal for daughter's event, if you add dressy shoes and accessories.
#7 blazer is yummy, and striking the way you have styled it as a column of color. Please don't be shy about wearing it this way! You have what it takes to stand out. But also great for mixing, of course!