Question: Designing Helmets Engineers must consider the breadths of male heads when determining motorcycle helmets. Men have heads breadths that are normally distributed with a mean of 6.0 in. and a standard deviation of 1.0 in. Due to financial constraints, the helmets will be designed to fit all men except those with head breadths that are in the smallest 2.5% or largest 2.5%. Find the minimum and maximum head breadths that will fit men.