A mixture of N, and O, at 298 K is diffusing at 101.32 kPa total pressure and 300 K through a capillary having a radius 60 A (angstrom). Calculate the Knudsen diffusivity of N₁. a) 1.90×10 m²/s b) 2.90×100 m²/s c) 1.20x10 m²/s d) 2.50×10-06 m²/s