While preparing for their comeback tour, the flaming Roger's find that the average time it takes their sound tech to set up for a show is 53.6 minutes, with a standard deviation of 6.8 minutes. If the band manager decides to include on the fastest 39% of sound techs on the tour, what should the cutoff time be for concert set up? Assuming the times are normally distributed

The cutoff time for concert setup rounded to the nearest minute should be how many minutes?