I neeed the Sample size for Campus 3?

I neeed the Sample size for Campus 3?

?I neeed the Sample size for Campus 3?

The Stratified university has three campuses. The StatCom organization would like to estimate the average age of students at Stratified university within 1 year. A stratified random sample is taken using the three campuses as strata. From a previous survey the organization has the following summary statistics: Campus Total number of Sample Cost per students standard deviation observation 1 6250 2 $2 2 7720 4 $3 3 10300 3 $4 If we want to use the optimal allocation, what is the appropriate sample size from Campus 3? a ) 16 () 8 d)25 e) 14 b) 38