2. Identify the IV (the levels of the IV where appropriate), and DV in each of the following: a) The results from an experiment indicate that increasing the amount of lighting by 50% as well as by 25% during winter months results in lowered levels of depression when compared to no increase in the amount of lighting. b) Anne conducted a study to see if theater majors are smarter than music majors. She handed out questionnaires in five advanced theater classes and five advanced music classes. She asked the students to record their grade point averages and their majors. c) Alcohol intake leads to a drop in body temperature. To study this effect, researchers gave one set of mice 5 ounces of alcohol and another set got 2 ounces of alcohol. They measured the change in each mouse's body temperature 15 minutes after taking the alcohol. d) A researcher provides subjects with three lists of words: list A has monosyllabic words, list B has two-syllable words, and list C has three-syllable words. The subject can study the three lists for 2 minutes each, at which point they are asked to list all the words they can recall. The researcher wants to know the relationship between recall and number of syllables in a word