please solve it only if you are sure

At a tourist destination in Oman, a local handmade souvenir shop is able to sell over 550 units of a particular Omani khanjar (knife) on an average yearly. However, the demand of this product is uncertain and thus during the lead time the demand is assumed to be normally distributed with mean of 20 units and a standard deviation of 5 units. Ordering cost is 5 OMR per order, and the holding cost is 15% of selling price of the item with OMR 20 per unit. If the shop is willing to accept only 2 stockout per year, what will be the probability that a stockout may be observed in any order cycle during the year? O a 0.091 Ob. 0.012 Oc0.192 od 0.077 be 0.154 of None is correct Og 0.182 Using exponential smoothing method, forecast the demand for the fourth period. The historical demand for the previous three periods is 45.42 and 43 respectively, assume Alpha=0.75 (Round to 2 decimals) O a 41 b. 41.92 Oc428 Od 42.75 O e None is correct