pls help me w this 4?questions

4. An equilibrium system shifts left when the A. rate of the forward reaction is equal to the rate of the reverse reaction. B. rate of the forward reaction is less than the rate of the reverse reaction. C. rate of the forward reaction is greater than the rate of the reverse reaction. D. rate of the forward reaction and the reverse reaction are constant. 5. A 1.00L flask contains a gaseous equilibrium system. The addition of reactants to this flask results in a A. shift left and a decrease in the concentration of the products. B. shift left and a increase in the concentration of the products. C. shift right and a decrease in the concentration of the products. D. shift right and a increase in the concentration of the products. In which of the following will both stresses shift the equilibrium to the right? A. a decrease in temperature and a decrease in volume. B. a increase in temperature and a decrease in volume C. a decrease in temperature and a increase in volume D. a increase in temperature and a increase in volume 7. Consider the following equilibrium: 2SO2(g)+O2(g)=2SO3()H=198kJ There will be NO shift in this equilibrium when A. more O2 is added. B. a catalyst is added. C. the volume is increased. D. the temperature is increased