Ignoring air resistance, what maximum speed can be given to a horizontally moving tennis ball at the height of 1.8 m as it passes over the net to remain within the court, which is 12.0 m from the bottom of the net? a) 10.0 m/s
b) 15.0 m/s
c) 20.0 m/s
d) 40.0 m/s

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).