The Young’s double-slit experiment is done in a medium of refractive index 4/3. A light of 600 nm wavelength is falling on the slits having 0.45 mm separation. The upper slit $s_1$  is covered by a thin glass sheet of thickness $10.4\mu m$  and refractive index 1.5. The interference pattern is observed on a screen placed 1.5m from the slits. All the wavelengths given in this problem are for the given medium of refractive index 4/3. Ignore dispersion (Assume that source is symmetric to the slits, centre of the screen is taken as origin)
The location of the zeroth order maximum (bright fringe) with zero path difference on the y-axis is (in mm)