You are in charge of reviewing IQs of military personnel and know that IQ scores are basically distributed with mean of 100 and standard deviation of 15. Housing has 200 occupants and you've determined that results of their IQ testing mimic the population as a whole. The commander desires to know how many of the soldiers have an IQ of
a. at least 100
b. between 85 and 115
c. not more that 70
What answers should be provided to the commander?