Finding Concentration of C at Equilibrium

Consider the following reversible chemical reaction at equilibrium:

2A(g) + B(g) <=> 3C(g)

At a certain temperature, the equilibrium constant, K_c, is measured to be 4.0. Given that the initial concentrations of A, B, and C are 1.0 M, 1.0 M, and 0.0 M, respectively, what will be the concentration of C at equilibrium?