Here are my images, taken in my garden, when the rain had eased to a few drops (its been raining here almost non-stop since I started the course)
I viewed the histograms on my camera, then uploaded and viewed in Photoshop. You can see I’ve taken a screen shot of each one. Just as the course material predicted, there are variations, despite the fact it is the same scene, photographed all in within a few seconds. Histograms are slightly familiar to me, as I know them from adjusting curves. We can see that the graph represents dark (on the left) to the lightest values (on the right). In each of these pictures, the mid-tones are the greatest proportion.
Out of curiosity, I also viewed the quantity of each RGB colour from one of the images. You can see there is a great deal of blue in the darker tones.