This photo was taken for Task 3. It was used to represent the “proper” exposure, however it is still too dark:

 

In  Camera Raw, I adjusted basic qualities based off of the suggested “optimal” photo. Overall, I increased the exposure by about half a stop and tinted the image ever slightly more green, but kept the colour temperature the same. I also made the highlights slightly brighter and the shadows slightly darker in addition to increasing the amount of black. Then, in photoshop, I selected only the water to bring the exposure down a little so that the metal and the reflective water are more similar in density. Here is the result: