phase 1initially all valves a b c d e and f are

Question

Phase 1

Initially ALL Valves A, B, C, D, E and F are closed.

 ALL Tanks A, B, C, D, E are separated and each sealed from the atmosphere.

Tank E initially has 2' of air @ 32.476 psi.   15' x 27' x 2'

Tank C and Tank B initially contain air @ 32.476 psi

Pipe K initially is 12" id x 5' @ 32.476 psi

Tank A:  15' x 27' x 50'    20,250 ft3

Tank D:  100' x 100' x 100' clear water

Phase 2

Valve D and F are opened 1^st.

Valve E, A and B are opened 2^nd.

Valve C remains closed.

When Tank C and Pipe K have exhausted all  air, valves A, B and E close simultaneously. Valves F and D remain open.

1. What is the elapsed time for air in Tank C and Pipe K to move to Tube B?
2. What is the height and psi of Air in Tank E and Tank A?
3. What is the final height and psi of air column Tube B Section F and G?