The density of a metal

A student measures four samples of a mystery metal: their volumes are $20$, $35$, $50$ and $80\ \text{cm}^3$, and their masses $179$, $313$, $448$ and $717\ \text{g}$. You will make the program find each density in $\text{kg/m}^3$, the average, and the volume of $1\ \text{kg}$ of the metal. It then names the metal from a table and draws mass against volume.

The idea. $\text{density} = \dfrac{\text{mass}}{\text{volume}}$, and $1\ \text{g/cm}^3 = 1000\ \text{kg/m}^3$. For one material, mass grows in step with volume, so the points lie on a straight line.

Your tasks.

1. Inside the loop, work out d, the density of each sample in $\text{kg/m}^3$.
2. Find average, the average of the four densities.
3. Find volume_1kg, the volume of $1\ \text{kg}$ ($1000\ \text{g}$) of the metal, in $\text{cm}^3$.