Example: Diffusion of A Through Nondiffusing B and C At 298 K and 1 atm total pressure, methane (A) is diffusing at steady state through nondiffusing argon (B) and helium (C), At z = 0, the partial pressures in atm are PAI = 0.4, PB₁ = 0.4, and Pc₁ = 0.2, and at z₂ = 0.005 m, PA2 = 0.1, PB2 = 0.6, and pc2 = 0.3. The binary diffusivities from Table 6.2-1 are DAB = 2.02×10-5 m2/s, DAC = 6.75×10-5 m2/s, DBC = 7.29×10-5 m2/s. Calculate NA.