Determine the clear sky day and the cloudy day work-plane illuminances for a \(30 \mathrm{ft}\) long, \(30 \mathrm{ft}\) wide, \(10 \mathrm{ft}\) high light-colored room. A \(20 \mathrm{ft}\) long by \(7 \mathrm{ft}\) high window with \(1^{1 / 4-i n ~ c l e a r ~ g l a s s ~ f a c e s ~} 10^{\circ} \mathrm{E}\) of south, the building is at \(32^{\circ} \mathrm{N}\) latitude, and it is January 15 at 2 p.m. solar. The ground outside is covered by dead grass.