1.) Why is it useful for security mirrors at grocery stores and other businesses to have a complex shape? 2.) Car side mirrors warn "objects in mirror closer than they appear", because convex mirrors cause images to appear similar. Discuss relative advantages of different types of mirrors (convex, concave, plane) for cars. 3.) Why do people sometimes sustain neck and spinal injuries when diving into unfamiliar ponds or waters? 4.) In what way is a camera lens similar to the lens of an eye? In what way is it different? Please explain in details (each question in 3-4 sentences) thank you