An instructor grades on a curve by assuming that grades on a test are normally distributed. If the average grade is 80 and the standard deviation is 5 , find the test scores for each grade interval if the instructor assigns grades as shown below. 10% A's, 20% B's, 40% C's, 20% D's, and 10% F's Click the icon to view the area under the standard normal curve table. Find the test scores to receive an A. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type an integer or a decimal. Round to two decimal places as needed.) A. or greater B. or lower C. Between and Find the test scores to receive a B. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type an integer or a decimal. Round to two decimal places as needed.) A. Between and B. or greater C. or lower Find the test scores to receive a C. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type an integer or a decimal. Round to two decimal places as needed.) A. or lower B. Between and C. or greater Find the test scores to receive a D. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type an integer or a decimal. Round to two decimal places as needed.) A. or lower B. Between and C. or greater Find the test scores to receive an F. Select the correct choice below and fill in the answer box(es) to complete your choice. (Type an integer or a decimal. Round to two decimal places as needed.) A. Between and B. or greater C. or lower