All of the positions are multi-skilled. We want to get people who can do everything, not just one specific task over and over. So, yes, all three positions require ability to do 2D static images, sprites, animations, and concept artwork. Although, if you only specialize in one or two of those areas, we will still consider you, if you are good.
It it can pay up to 6,000 dollars over the coarse of 3-4 months. However, it does not pay hourly, it pays per commission. So if the position holder does not work or does not work well, they won't get much. But if they take initiative and do all the artwork that they can to the best of their ability, they will be making more. It all depends on what you put into it! It is part time, though.