Liquid Flow Calculation in 30ft System with Various Valve Sizes

[el pablo]

An entire system is filled with liquid.
At the top (30 feet) is a 2 gallon container,
connected to a tube (1.25" ID) for 14 feet,
connected to a tube (1.00" ID) for 10 feet,
then split with tees to 8 valves (.75" ID) and tubing (1.00" ID).

|....|
|....|
|...2.g...|
|....|
.\_..._/
...\.../
...|...|
...|...| 14 feet (1.25" ID)
...|...|
...|...|
...|...|
...|...|
...\../
...||
...||
...|| 10 feet (1.00" ID)
...||
...||
...||
...//\\
=O=O=O=O= valves

(sorry, the diagram on paper looks a lot better)

What is the flow rate at one opening if all valves are opened?
what is the flow rate at one opening is one valve is opened?

 

[haa72]

is it an assignment , obviously it looks like an asignment