I need help

MY NO Let x = red blood cell [RBC) count in millions per cubic millimeter of whole blood. For healthy females, x has an approximately normal distribution with mean a = 4.1 and standard deviation a = 0.5, The Standard Normal Distribution (1 =0, 0 = 1) -2 - RJ 68% of area 95% of area 99.7% of area (a) Convert the x interval, 4.5