How to Write Rate Equation of Reversible Reaction?

Integrate Rate Equation for Zero Order Reaction || Characterstics OF Zero Order Reaction

The correct explanation for the effect of catalyst on the rate of reversible reaction is

If the forward rate constant of reversible reaction is 0.16 and backward rate constant is 4xx10^(4) , then the equilibrum constant will be .

What is the effect of adding a catalyst on the rate of a reversible reaction in the forwards and the reverse direction?

How is it possible to make reversible reaction irreversible?

(i) What is the effect of adding a catalyst to a reversible reaction? (ii) What is the effect of adding an inert gas to a reversible reaction? (iii) How does temperature change affect a reversible reaction?