Write the chemical reaction for when a strong acid is added to the acetic acid

Complete each of the following chemical reactions for an acetic acid/acetate buffer.

How would you write a chemical equation for the reaction of an acetic acid/acetate buffer if a) strong acid is added to the buffer, and b) strong base is added to the buffer?

An aqueous solution of a strong acid, HClO4, is 0.34 mM in the acid. What is the pH of this solution? Also write the chemical reaction for the acid-base reaction that is occurring in solution for this acid.