If you increase the frequency of a sound wave four times, what will happen to its speed? a. the speed will increase four times. b. the speed will decrease four times. c. the speed will remain the same. d. the speed will increase twice. e. the speed will decrease twice. reset

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).