In the figure shown below, q=2nC, q2=-3nC, and qs=-4nC are on the corners of an equilateral triangle (each side is 5 mm). How much work is needed to take charge q to infinity? (hint: the amount of work is the change in potential energy, so to calculate work, you need to calculate the potential energy before and after moving charge q to infinity). D 9 a. (3 points) Write down all the equations you use. h (5 points) Show your detailed work (including plugging in the numbers into the equations shown