Two colors are described by their chromaticity coordinates and luminance values: x1 = 0.1 y1 = 0.6 LV1 = 500 lm/m2 sr x2 = 0.6 y2 = 0.3 LV2 = 250 lm/m2 sr When these two colors are combined, what are the chromaticity coordinates of the resulting color? Plot the original two colors and the combined color. Also determine the dominant wavelength and excitation purity.