can someone help me with B

Gainesville Cigar stocks Cuban cigars that have variable lead times because of the difficulty in importing the product: Lead time is normally distributed with an average of 5 weeks and a standard deviation of 3 weeks. Demand is also a variable and normally distributed with a mean of 250 cigars per week and a standard deviation of 23 cigars. Refer to the standard normal table for z-values. This exercise contains only parts a and b. a) For a 96% service level, what is the ROP? The reorder point is 2,566 cigars (round your response to the nearest whole number). b) What is the ROP for a 97% service level? The reorder point is cigars (round your response to the nearest whole number)