Kyle wants to examine the different diets of students at UBCO. In his experiment he is looking at 5 different diets: vegan, vegetarian, carnivore, Well-pizza only and no preference. Kyle chooses to use an open-ended question in his experiment because he hasn't taken PSYO 270 and doesn't realize that this is not the best option in this case. He gets lazy and uses a convenience sample. How many levels are in this experiment?