For the reaction: N₂(g)+2O₂(g)⇌2NO₂(g),KC=8.3×10¹⁰ at 25∘C. What is the concentration of N₂ gas at equilibrium when the concentration of NO₂ is four times the concentration of O₂ gas? a 1.9×10¹⁰M b 8.3×10¹⁰M c 5.2×10¹⁰M d 4.8×10¹⁰M e 2.1×10¹⁰M