There are two boxes containing only black and blue pens. Box A has 3 black pens and 9 blue pens. Box B has 4 black pens and 16 blue pens. A pen is randomly chosen from each box. List these events from least likely to most likely. Event 1: choosing a black or blue pen from Box B. Event 2: choosing a black pen from Box B. Event 3: choosing a black pen from Box A. Event 4: choosing a yellow pen from Box A. Least likely Most likely Event, Event Event, Event