A company wants to determine its reorder point $($R$).$ Demand is variable and the company wants to build a safety stock into R$.$ If the average daily demand is $12,$ the lead time is $5$ days, the desired z value is $1\mathrm{.}96,$ and the standard deviation of usage during lead time is $3,$ which of the following is the desired value of R$?$

Question $10$Select one:

a$.$

About $6$

b$.$

About $16$

c$.$

About $61$

d$.$

About $66$