comparing levels

Respected,
Has to compute the increase/decrease in level or recipient reservoir(reservoir 2) due to increase/decrease in level and flow from donor reservoir(reservoir1)
Please bear with me as I am a bit baffled.
Zohar Batterywala [ATTACH]n1201602[/ATTACH]

Respected,
I think one of the issue is solved, now another issue in that same is to be solved.

Also PLEASE PLEASE evaluate solution of the solved issue as it is working in all cases((1)-ve,-ve (2)-ve,+ve (3)Zero, -ve (4)-ve, zero, (5)zero,+ve and many other such ways

And help me to find the solution of the next issue( values of R3 compared to values of R1)

Zohar Batterywala [ATTACH]n1201770[/ATTACH]

Respected,
I think one of the issue is solved, now another issue in that same is to be solved.

Also PLEASE PLEASE evaluate solution of the solved issue as it is working in all cases((1)-ve,-ve (2)-ve,+ve (3)Zero, -ve (4)-ve, zero, (5)zero,+ve and many other such ways

And help me to find the solution of the next issue( values of R3 compared to values of R1)

Zohar Batterywala [ATTACH]n1203448[/ATTACH]