A certain product has been statistically controlled at a process average of $36\mathrm{.}0$ and a standard deviation of $1\mathrm{.}00.$ The product is presently being sold to two users who have different specification requirements. User A has established a specification of $38\mathrm{.}0+-4\mathrm{.}0$ for the product, and user $B$ has specification of $36\mathrm{.}0+-4\mathrm{.}0$