A reaction vessel of volume 3.00 L is filled with 0.342 mol CO(g), 0.215 mol H₂(g), and 0.125 mol CH₃OH(g). Equilibrium is reached in the presence of a zinc oxide–chromium(III) oxide catalyst and, at 300°C, K_c = 1.1 * 10^–2 for the reaction CO(g) + 2 H₂(g) ⇌ CH₃OH(g). 

(a) As the reaction approaches equilibrium, will the concentration of CH₃OH increase, decrease, or remain unchanged?

(b) What is the equilibrium composition of the mixture? (You may wish to use graphing or mathematical software to solve the cubic equation.)