You are trying to determine what the best combination of diet and exercise provides the lowest resting pulse rate. You decided to try three different diets (Atkins, Paleo, McDonalds only), along with no dieting, and two different forms of exercise (Yoga, high cardio), along with no exercise. You try each combination possible, and measure the resting pulse rate for each group after 3 weeks of testing. How many dependent variables do you have?