1. The average amount of salt consumption per day by an American is 15 grams (or 15,000 milligrams), although the actual physiological minimum daily requirement for salt is only 220 mgs. Suppose the amount of salt intake per day is approximately normally distributed with a std deviation of 5 grams. a) What proportion of all Americans consume between 14 and 22 grams of salt per day? b) Physicians recommend that those Americans who want to reach a level of salt intake at which hypertension is less likely to occur should consume less than 1 gram of salt per day. What is the probability that a randomly selected American consumes less than 1 gram of salt per day