The red blood cell counts​ (in millions of cells per​ microliter) for a population of adult males can be approximated by a normal​ distribution, with a mean of 5.6 million cells per microliter and a standard deviation of 0.5 million cells per microliter. ​(a) What is the minimum red blood cell count that can be in the top 30​% of​ counts?
​(b) What is the maximum red blood cell count that can be in the bottom 16​% of​ counts?