Quinn owns a cafe.
He wants to estimate the number of females that drink coffee at his store each morning.
Which method of data collection should he use?

Count the number of females walking past the cafe each morning. 

Survey the employees about how many females they estimate enter the cafe each morning. 

Survey the bakery next door about the number of females they serve each morning. 

Count the number of females that enter the cafe at different times of the morning. 

Count the number of females that enter the cafe at different times throughout the day. 