An open mic night at a local caf is popular on Wednesday nights. Between 8-10 p.m., a performer arrives on average every 3.5 minutes. The performers sign up on a first come, first serve basis and each performer is asked to keep their songs short. Most performers abide by this and the average performance time is 3 minutes. With this information, please answer questions 22 to 24 below. On average how many performers are in the caf? Round your answer to the next integer number