In the Reaction: 2 N₂O(g) + N₂H₄(g) ⇌ 3 N₂(g)

In the reaction: 2 N₂O(g) + N₂H₄(g) ⇌ 3 N₂(g) + 2 H₂O(g) ,
One starts with 0.10 mol N₂O and 0.25 mol N₂H₄ in a 10.0 L container. If there are 0.06 mol N₂O at equilibrium, how many moles of N₂ are present?

A) 0.02
B) 0.04
C) 0.06
D) 0.09
E) 0.07