Mixing blue with what other color will produce a neutral gray?

Oliver is out on location for a photo shoot. he prefers working with natural light. he has, however, realized that direct light is falling on the subject. how can oliver soften the natural light?

Organum was first developed by religious singers adding another melody directly above the chant and mirroring the chant line. true false

What’s the difference between 16th & 17th century as opposed to how theatres are in today’s society?