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)

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?