Need to know how to solve for C.

The average American man consumes 9.6 grams of sodium each day. Suppose that the sodium consumption of American men is normally distributed with a standard deviation of 0.9 grams. Suppose an American man is randomly chosen. Let X = the amount of sodium consumed. Round all numeric answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that this American man consumes between 10.3 and 11.6 grams of sodium per day. c. The middle 30% of American men consume between what two weights of sodium? Low: High: