Can you please help me? It’s a science question and I really don’t know the answer

Need in all of themmm only answer if you know pls

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.