u/Automatic_Yam_8635

I’ve been working on this problem and i’m not sure if i’m heading in the right direction. I’m especially stumped on question C. Any guidance would be appreciated. My initial attempt is in the second picture.

We’re currently working on photons, atoms, and energy in my physics 2 class, and I’m really struggling with the concept. I’m specifically stuck on this problem, I included my first attempt in the second picture. Any help would be super appreciated!