2. (6) Identify whether each of the following study is experimental or observational. Studies Observational Experimental Study 1: A study was conducted measuring the impact that music volume has on beer consumption. The researchers went into bars, controlled the music volume, and measured how much beer was consumed. The article states that "the sound level of the environmental music was manipulated according to a randomization scheme." It was found that louder music corresponds to more beer consumption. Study 2: A study measured heath characteristics for each of 63 adult participants and asked participants how many vacations they had taken in the last year. Results shows that those who had taken more vacations had better results on the health measures. Study 3: For a high school science project, a 16- year-old girl randomly divided fruit flies into two groups, and feed on group organic food and other group non-organic food. The flies feed organic food lived an average of 3.25 days longer than flies feed non-organic