Answer the all pls!! It's my last assignment

Part 2: Design an Experiment You are tasked with designing an experiment to determine the amount of fertilizer to use to best help plants grow taller. Answer the following questions about how you would go about designing your experiment. What would be your independent variable? amount of fertilizer 2. What would be your dependent variable ? B. Write an example hypothesis for your experiment. 4. Describe at least 3 variables you would need to hold constant in your experiment. 5. In a brief paragraph, describe your experimental design including what data you would collect