4. The friendly sausage company orders the sausages that they use at the end of each week. They consume on average 7kg sausage per day with a standard deviation of 2.5kgs. It takes 1,5 days to get their orders from the butcher outside the city. This week they start with a sausage stock of 10 kgs in their fridge. They want to keep their service level at 99%. How much order they should place at the end of each week(5 points)