Not entirely sure what to do for this problem. Help would be appreciated! Let’s look at how grain size affects porosity and permeability. In each of these cases, we will analyze how changing the sizes of different spherical particles/grains (a little unrealistic, but spheres are the easiest shape to use) change porosity and permeability. In each of these, we are filling a 1 m X 1 m X 1m cube with spheres (balls). Calculate the volume, surface area, and porosity for each of the scenarios. Assume the spheres have cubic packing, like this image showing spheres with a 0.25 m radius inside a 1 m3 cube (image from researchgate.net). Be careful about calculating the number of spheres in the last two examples.