Please evaluate the accurate solution of the following Problem
Problem- You are collecting plasma from a patient with a pheresis machine that takes whole blood from the body, extracts 80% by mass of the plasma and returns the remainder of the blood to the body. For this operation the blood composition can be modeled as 55% by mass plasma and 45% by mass cells. If a patient donates 1.0 liter of plasma (p=1025 kg/m^3), calculate the following:
Part 1- Calculate the amount (mass) of blood extracted from the donor.
Part 2- Calculate the concentration (mass fraction) of cells and plasma in the concentrated blood.
Part 3- Calculate the mass of concentrated blood returned to the donor.
I need help to compute the amount of blood extracted.