The table shows the performance of a selection of $111$ stocks after one year. $($Take S to be the set of all stocks represented in the table. If a stock stayed within $20\%$ of its original value, it is classified as "unchanged".$)$CompaniesTotalPharmaceuticalPElectronicEInternetIIncreasedV$1341734$UnchangedN$3201143$DecreasedD$1341734$Total$58845111$Compute n$($P N$\text{'}).$ What does this number represent?n$($P N$\text{'})$ is the number of stocks that were either not pharmaceutical stocks, or were not unchanged after a year $($or both$).$n$($P N$\text{'})$ is the number of stocks that were pharmaceutical stocks and were not unchanged after a year. n$($P N$\text{'})$ is the number of stocks that were not pharmaceutical stocks and were unchanged after a year.n$($P N$\text{'})$ is the number of stocks that were either pharmaceutical stocks, or were unchanged after a year $($or both$).$n$($P N$\text{'})$ is the number of stocks that were either pharmaceutical stocks, or were not unchanged after a year $($or both$).$