Suppose that the scores on a statewide standardized test are normally distributed with a mean of 67 and a standard deviation of 6. Using empirical rule of 68%, 95%, and 99.7%, estimate the percentage...

Suppose that the scores on a statewide standardized test are normally distributed with a mean of 67 and a standard deviation of 6. Using empirical rule of 68%, 95%, and 99.7%, estimate the percentage of scores that were

Please solve a, b and c. Thanks

Extracted text: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 67 and a standard deviation of 6. Using empirical rule of 68%, 95%, and 99.7%, estimate the percentage of scores that were (a) between 49 and 85. (b) above 73. (c) below 55.