The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business. The average GMAT score is 547.+ Assume that GMAT scores are bell-shaped with a standard deviation of 100. (a) What percentage of GMAT scores are 647 or higher? (b) What percentage of GMAT scores are 747 or higher? (c) What percentage of GMAT scores are between 447 and 547? (d) What percentage of GMAT scores are between 447 and 747?Suppose the data have a bell-shaped distribution with a mean of 20 and a standard deviation of 5. Use the empirical rule to determine the percentage of data within each of the following ranges. (a) 10 to 30 O approximately 68% approximately 95% O almost all (b) 5 to 35 O approximately 68% O approximately 95% O almost all (c) 15 to 25 O approximately 68% approximately 95% almost all