I'm probably misunderstanding you completely, but from what I understand you are looking for a coordinate?if so, could it be (-4, 9)?if this is right, then I don't understand why you would need to ask for help :Iso I assume that I am wrong
nvm i got ityou need to take the arc legnth, convert to degrees, use sin and cos trig functions on the angle you got to get the two coords, then adjust their sign based on the quadrant