The picture above shows fluid in a section of pipe. The pipe is narrow where point A is located, widens out some where points B and C are located, and widens again where point D is located. Points C and D are vertically below points A and B.

If the fluid is at rest in the tube, rank the four points based on their pressure.

1. Equal for all four
2. A>B=C>D
3. D>B=C>A
4. A=B>C=D
5. C=D>A=B
6. A>B>C>D
7. D>C>B>A
8. It's ambiguous - there are two possible answers
9. None of the above

If the fluid is flowing from left to right through the tube, rank the four points based on the speed of the fluid at their location.

1. Equal for all four
2. A>B=C>D
3. D>B=C>A
4. A=B>C=D
5. C=D>A=B
6. A>B>C>D
7. D>C>B>A
8. It's ambiguous - there are two possible answers
9. None of the above

If the fluid is flowing from left to right through the tube, rank the four points based on their pressure.

1. Equal for all four
2. A>B=C>D
3. D>B=C>A
4. A=B>C=D
5. C=D>A=B
6. A>B>C>D
7. D>C>B>A
8. It's ambiguous - there are two possible answers
9. None of the above

If the fluid is flowing from right to left through the tube, rank the four points based on their pressure.

1. Equal for all four
2. A>B=C>D
3. D>B=C>A
4. A=B>C=D
5. C=D>A=B
6. A>B>C>D
7. D>C>B>A
8. It's ambiguous - there are two possible answers
9. None of the above