Please help me with this Question, this is the second time I am asking and deadlines are too close and I do not know half of the answers

1. Derive as expression from a mass balance approach that defines the fraction of a compound in each of 3 phases that contains only variables for partition coefficients and volume that can be applied to any 3-phase problem involving air, water, and a NAPL or oil (e.g., NAPL, fat, etc.). Define your variables and subscripts.
   • f_i,o (o=OIL, e.g., organic liquid, NAPL or fat blob)
   • f_i,w (w=aqueous phase)
   • fi,_a (a=air)
   • Hints to answer :
     • 1- Consider the definition of fraction - part over whole, the mass of X in phase Y relative to the total mass in all the phases in the system.
     • 2- partition coefficient - ratio of concentrations use partition coefficients with the denominator being concentration in water
     • 3-Consider the definition of concentration, e.g., mass or moles of a compound per volume