Ok, so we have three pen cups, each with two pens in them. One cup has two black, one cup has two red, and one cup has a black and a red pen in it. The cups are labeled BB, RR, and BR, but someone has switched the labels and replaced all the pen caps with blue caps. There is no way to visually tell what color each pen is. Assuming that none of the labels are correct, what is the minimum number of pens we would have to test in order to be able to tell the color of all the pens *