For your second post, let's switch gears and fire up both your brain and your Excel muscles. O-negative blood can be given to anyone and is found in about 6.6% of people. If donors line up at random, what is the probability that 2 of the first 4 donors have O-neg. blood? First, tell which distribution is needed and why. Then either post your steps or ascreenshot of how we can find the probability in Excel.