what effects are produced by an enzyme on the general reaction below? Select all that apply

k1
S --> <--- P
k2

a.) the rate constant for the forward reaction (K1) increases

b.) the reaction equilibrium is shifted away from the reactants

c.) the activation energy for the reaction is lowered

d.) the formation of the transition state is promoted

e.) Delta G for the reaction decreases

f.) the concentration of the products is decreased