Given the Following Two Reactions and Their Corresponding Equilibrium Constants

Given the following two reactions and their corresponding equilibrium constants, K c , at 298 K:
1 / 2 N₂(g) + 1 / 2 O₂ NO (g) K c1 = 6.49*10^{- 16} 2 NO₂ (g) 2 NO (g) + O₂(g) K c2 = 4.25*10^{- 13} What would be the equilibrium constant , K c , for the net reaction given below?
N₂(g) + 2 O₂(g) 2 NO₂ (g) K c, net = ??

A) 1.79×10 ^{- 43}
B) 2.76×10 ^{- 28}
C) 9.91×10 ^{- 19}
D) 1.53×10 ^{- 3}
E) 5.99×10⁴