Smylie & Son uses a fixed$-$period system to manage its inventory of hand$-$rolled cigars. One model, the El Diablo, enjoys robust demand at $480$ boxes per week $(20$ cigars per box$)$ with a standard deviation of $120.$ Cigars must be stored in a carefully controlled climate, so storage costs are $$5/$cigar per year. Smylie and Sons supplier is located on an island south of Miami, Florida, and ordering is complicated and thus expensive, at $$1,500$ an order. Even at that price, it takes an average of six weeks to receive a shipment. The $"$El Diablo" is popular even at the exorbitant price Smylie & Son charges, so the company is loath to run out of stock and has set its service level at a respectable $99$ percent. What should the review period be$?$Group of answer choices

$6$ weeks

$7$weeks

$8$ weeks