A pipe of water of varying diameter is 1 cm in internal diameter at point A, where the speed of the water is viewed to be 4.0 m/s. At point B, the internal diameter is 4 cm. Determine at what speed is the water flowing at point B?
i) 1/4
ii) 1/2 m/s
iii) 2.0 m/s
iv) 4.0 m/s
v) None of the above.