$3\mathrm{.}1$ Consider a process with six sinks and five sources $($Sorin and Bedard

$.$ The process data are given in Tables $3-7$ and $3-8.$ Fresh water is used

in the sinks and it is desired to replace as much fresh water as possible

using direct$-$recycle of process sources. Determine the target for minimum

usage of fresh water and waste discharge after direct$-$recycle. How many

material recycle pinch points are there? What is their significance?

i need the graphical solution not algebric,please.