Answer asap please :)

The value of the equilibrium constant is 50 for the reaction, H2(g)+I2(g)2HI(g) If [H2] is 1.2mol/L and [I2] is 0.60mol/L at equilibrium, the concentration of HI at equilibrium is: a) 1.4102M b) 6.0M C) 3.6101M d) 1.4102M e) 2.4M