In 2016, the average number of voters arriving at Precinct A was 35 per hour and the arrival of voters was random. NYC had deployed 1 voting machine in Precinct A. Suppose service times were also random and that each voter spent on average 1.5 minutes in the voting booth (this is the time needed to cast her/his vote using a voting machine). What is the average time a voter waits before he/she can go in the voting booth