pls help ill like 9

Frank Planki, the manager of an organic yogurt processing plant desies a cuaity specificason whth a mean of 18.0 ouncet, an upper specification limk of 1 th 9 ounces, and a loser specification limit of 17,1 ounces. The process has a mean of 180 ounces and a standard deviation of 4 ounce: The process capabuty index (C+)= (round your response to three desimal paces)