In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Question: What happens to the kinetic parameters of a michael enzyme in the presence of a competitive inhibitor ?:
Options: <1> Vmax decreases, Km increases. <2> Vmax decreases, Km decreases. <3> Vmax decreases, Km does not change. <4> Vmax does not vary, Km increases. <5> Vmax does not vary, Km decreases.
4