There a six seats in a bar Your friend took the second seat

There a six seats in a bar. Your friend took the second seat from the left. Once he sits down, the other five people slowly get up one by one, but in a random order. As soon as a seat opens up next to your friend you got and sit next to him. Let A be the number of people who get up before i can sit next to my friend. What is the PMF of A??

PMF will be 1/5,1/4,1/3,1/2,1/1