[" 8.Two coherent monochromatic light beams of intensities "I" and "4" I are superimposed; the "],[" maximum and minimum possible intensities in the resulting beam are: "],[[" (a) "5" I and I "," (b) "5" I and "3" I "," (c) "9" and "I," (d) "9" and "3" I "]]