Edit passport size photos as per specifications

"I have these four passport size photos which I need to use for visa application. They are very strict about the size and color of photos. I kindly request you to edit them for me so that they will be accepted by the visa system. The size should not be more than 240kb (600x600 pixels) and the color must reflect natural skin tones.

I will appreciate if you could edit them for me. Thank you."