A typical bacteria cell is around 5 micrometers in diameter. The nearest we can bring our eyes to an object and still focus on it is about 25 centimeters. Using this information and the Rayleigh criterion, what size eye opening (pupil diameter) must we have in order to resolve two adjacent bacteria? Give your answer in millimeters. (use the wavelength at the midpoint of visible light, 550nm, for your calculations)