Determine the sidelighting workplace illuminances for a \(20 \mathrm{ft}\) long, \(15 \mathrm{ft}\) wide (deep), \(8 \mathrm{ft}\) high light-colored room with a \(15 \mathrm{ft}\) long by \(5 \mathrm{ft}\) high window. Assume that the direct sun plus clear sky illuminance is \(3000 \mathrm{fc}\) and the ground-reflected illuminance is \(200 \mathrm{fc}\).