stats and probability

Americans consume on average 32.3 Ibs of cheese per year with a standard deviation of 8.7 lbs. Assume that the amount of cheese consumed each year by an American is normally distributed. An American in the middle 70% of cheese consumption consumes per year how much cheese? 4 More than 35.1 lbs O Less than 41.3 lbs Between 23.3 lbs and 41.3 lbs O Between 41.3 lbs and 45.6 lbs