please show all work and explain what formulas were used

\begin{tabular}{|r|r|r|r|} \hline deman/month & p(x) & & \\ \hline 12 & 0.2 & \\ \hline 13 & 0.12 & \\ \hline 14 & 0.12 & \\ \hline 15 & 0.4 & \\ \hline 16 & 0.4 & \\ \hline 17 & 0.3 & \\ \hline 18 & 0.07 & \\ \hline 19 & 0.07 & \\ \hline \end{tabular} find the eoq using the following info *the price of one unit of the item is $20 *the ordering cost is $15 *holding cost is 15% of the price of one unit lead time is one month the monthly demand is equal to the average demand find the following a) the eoq use eoq =sqrt(2 annual deman* ordering cost/holding cost) b) if yo want a service level of 80% then calculate the safety stock c) find the annual cost of holding the safety stock \begin{tabular}{|r|r|r|r|} \hline deman/month & p(x) & & \\ \hline 12 & 0.2 & \\ \hline 13 & 0.12 & \\ \hline 14 & 0.12 & \\ \hline 15 & 0.4 & \\ \hline 16 & 0.4 & \\ \hline 17 & 0.3 & \\ \hline 18 & 0.07 & \\ \hline 19 & 0.07 & \\ \hline \end{tabular} find the eoq using the following info *the price of one unit of the item is $20 *the ordering cost is $15 *holding cost is 15% of the price of one unit lead time is one month the monthly demand is equal to the average demand find the following a) the eoq use eoq =sqrt(2 annual deman* ordering cost/holding cost) b) if yo want a service level of 80% then calculate the safety stock c) find the annual cost of holding the safety stock