Consider the following reaction at 298 K:
$$2\text{NO}(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}_2(g)$$, $$K_p = 1.6 \times 10^{12}$$
In an experiment, the initial partial pressures are $$P_\text{NO} = 0.020$$ atm, $$P_{\text{O}_2} = 0.010$$ atm, and $$P_{\text{NO}_2} = 0.015$$ atm. Which of the following is the best approximation of the partial pressure of $$\text{NO}_2(g)$$ at equilibrium?