In a Young's double slit experiment, the intensities at two points, for the path differences (λ)/4 and (λ)/3 ( λ being the wavelength of light used)…

In a Young's double slit experiment, the intensities at two points, for the path differences $\displaystyle \frac{\lambda}{4}$ and $\displaystyle \frac{\lambda}{3}$ ( $\displaystyle \lambda$ being the wavelength of light used) are $\displaystyle I_1$ and $\displaystyle I_2$ respectively. If $\displaystyle I_0$ denotes the intensity produced by each one of the individual slits, then $\displaystyle \frac{I_1+I_2}{I_0}=$ $\displaystyle \_\_\_\_$.