A teacher gives a test to a large group of students. The results are closely approximated by a normal curve. The mean is 74 with a standard deviation of 4. The teacher wishes to give A's to the top 6% of the students and F's to the bottom 6%. A grade of B is given to the next 14%, with D's given similarly. All other students get C's. Find the bottom cutoff for a D. Click here to see page 1 of the table for areas under the standard normal curve. Click here to see page 2 of the table for areas under the standard normal curve. The bottom cutoff for a D is (Round to the nearest whole number as needed.)