How do i do this question？just number 5

5 a)

Start by arranging the materials by the sonic speed and then their physical state:

What trend do you identify from these data? Here's what I've got:

5 b)

The way microscopic particles are arranged in a substance helps distinguish between different physical states:

Sound travels as a longitudinal wave. As a sound wave passes through a medium, individual particles become excited and gain energy; as they run into others they transfer their energy to the next particle; the sound wave thus propagate across the medium. With a lower average distance between individual particles this action can proceed at a greater rate in average solids than in average liquids, and in average liquids than in average gases. Hence the trend.

a straight line sloped

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.