Metacognition is an understanding of one's own cognitive processes, like thoughts, perceptions, and memory. In a recent study of metacognition in mon- keys, a researcher presented monkeys with either a tube that was closed except at both ends, or a tube with an opening in the center that could be used to inspect the inside of the tube. In addition, subjects either watched or didn't watch a human placing food in one end of the tube that could later be retrieved by the monkey (Rosati & Santos, 2016). Apparently knowing that they needed more information to find the food, monkeys that did not observe the human were more likely to spontaneously inspect the center of the tube than monkeys that observed the human. Similarly, monkeys that did not observe the human were slower to choose the end of the tube baited with food than monkeys that observed the human. Data on amount of time to choose-similar to the results obtained in the study-are shown in the fol- lowing table. Mean SE Observed human 13.4 3.0 No observation 8.5 1.5 a. Construct a bar graph that incorporates all the information in the table. b. Looking at your graph, do you think that observ- ing the human had an effect on the amount of time needed to choose?