What is the lithosphere? Select all that apply. Select 2 correct answer(s)

1. The outer layers of Earth

2. The middle layers of Earth

3. The inner layers of Earth

4. Solid and plastic (can flow)

5. Solid and brittle (breaks instead of bending and flowing)

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.