The average daily demand for a product is normally distributed with a mean of $25$ units and a standard deviation of $4$ unitsLead time is fixed at $10$ days. Answer the following questionsUse appropriate formulae and tablesShow your calculations for each question. No credit is earned for answers without calculations a $)$ How much safety stock is needed if you are willing to have a stockout occur no more than $6\%$ of the time? b$)$ What is the reorder point?