Please, I need help with this task with explanation..

Please I need the hand writing to be very easy to understand..

TASK An Intense Source of Light Photographers often use multiple light sources to control shadows or to illuminate their subject in an artistic manner. The illumination from a light source is inversely proportional to the square of the intensity of the source. Two light sources, Ly and Ly, are 10 m apart, and have intensity of 4 units and 1 unit, respectively. The illumination at any point P is the sum of the illuminations from the two sources. Hint: When a quantity y is inversely proportional to the square of another quantity x, then - , where k is a constant. L 10 m a) Determine a function that represents the illumination at the point P relative to the distance from Ly- b) At what distance from Ly is the illumination on P the greatest?