Daily demand for a product is $130$ units, with a standard deviation of $15$ units. The review period is $10$ days and the lead time is $10$ days. At the time of review, there are $70$ units in stock. If $90$ percent service probability is desired, how many units should be ordered? Daily demand for a product is $130$ units, with a standard deviation of $25$ units. The review period is $10$ days and the lead time is $6$ days. At the time of review, there are $60$ units in stock. If $95$ percent service probability is desired, how many units should be ordered? $($Use Excel's NORMSINV$)$ function to find the correct critical value for the given a$-$level. Do not round intermediate calculations. Round $"\backslash ($ z $\backslash )"$ value to $2$ decimal places and final answer to the nearest whole number.$)$