Answer:
We need to know what the letter is and where it was originally. Also is the 100 one hundred degrees or one hundred coordinates?
Explanation:
1. For the translating part, simply pick one of the coordinates and move it three spaces to the right. Do this for each point.
2. For the reflecting part, count how many spaces each coordinate is from the y-axis, or vertical line. For the sake of example, let's say it is 3 spaces from the y-axis and started in the top left grid, or Quadrant III. You would then move said coordinate 3 spaces to the right in Quadrant IV, which is the top right.
I can't really help you on the rotating, since I don't know what form the 100 is in, but I hope this helped!