Ateacher gives a lot to a large group of students. The results are closely approximated by a normal curve. The meanis 73, with a standard deviation of 8. The teacher wishes to give to the top of udents and Fs to the bottom 70%. A grade of B is given to the next 16.7% with given arly Al other students get c's Find the bottom cutoff for a grade of The bottom cutoff for an Ais (Round to the nearest whole number as needed)