a) Equilibrium is the state of a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction.
b) Growing temperature increases the velocity of particles' movement and the amount of their effective collisions.
c) Increasing th temperature for the exothermic reaction will slow doun the rate of the forward reaction and speed up the rate of the reverse reaction.
d) Decreasing the pressure for this reaction will not effect the equilibrium.