In part A of the experiment a hair is illuminated with a laser and a diffraction pattern is observed. The wavelength = (648 21) nm and the pattern is projected on to the wall a distance L = (2.226 0.019) m from the hair. The distance across the central maximum is measured to be 2y= (0.048 0.002) m. The width of the hair is calculated to be a= 60.1 m Calculate the uncertainty in the width of the hair a in m, to one decimal place. You do not need to specify the units