Chocolate bars produced by a certain machine are labeled with 8.0 oz. The distri

Chocolate bars produced by a certain machine are labeled with 8.0 oz. The distribution of the actual weights of these chocolate bars is Normal with a mean of 8.1 oz and a standard deviation of 0.1 oz. A chocolate bar is considered underweight if it weighs less than 8.0 oz.What proportion of chocolate bars weights less than 8.0 oz?