Just need solutions! know how to do but dont have time

Demand for a particular item averages 100 units a week, and based on this item's particulars (its holding cost, ordering cost, etc.) the Economic Order Quantity for it has been determined to be 1400 units. If we wanted to manage this item using a Periodic Review approach, what would be the optimal order interval (in weeks)? (Just five the number, not the units). Question 2 5 pts For a given inventory item, demand averages 40 units per week, with a standard deviation of 6 units. Lead time for this item is 4 weeks. If we wanted to set a reorder point for this item that exposes to not more than a 2.5% risk of a stockout, that reorder point would be units. (Round to 2 decimal places and report only the number.)