While setting up your experiment, you notice that when you maintain the water level at the mark 10 mL above the filter (as designated in your lab manual), the rate that the water drains is at an annoyingly slow rate of 4.3 mL/min. However, due to time constraints, you want the water to flow at a rate of 30 mL/min instead. If your tube has an area of 3.3 cm2, how many cm higher should you maintain the water level? Give your answer in units of cm.