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Orchid provides quick project solutions. Clients send projects to Orchid via their web page and a employees develop the needed project solutions as quickly as possible. Orchid has five employees who do all of the solutions. On average, a project arrives once every 7 hours, with a standard deviation of 10.5 hours. Each project is assigned to one employee and that employee takes on average 30 hours to complete each project, with a standard deviation of 45 hours. How many uncompleted projects does Orchid have in the system on average at any given time?