Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) -- Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur?

Question

Consider the exothermic reaction CoCl42-(aq) + 6 H2O(l) --> Co(H2O)62+(aq) + 4 Cl -(aq). Will the equilibrium concentration of CoCl42- increase or decrease when the following changes occur?
(a) HCl is added.

increases 
decreases     
.(b) Co(NO3)2 is added.

increases 
decreases     
.(c) The solution is diluted with water.

decreases 
increases     
.(d) The temperature is increased.

increases 
decreases

Thanks