A double$-$slit interference experiment has the following parameters: wavelength $=633nm,d=1\mathrm{.}8mm,$ and $L=2\mathrm{.}0m.$ What is the linear distance $x$ between the $7$ th order bright fringe and the $3$rd order dark fringe on the screen? Express your answer in units of mm $.$ Please refer to Ch $23$ lecture slide page $24$ for the definition of mth order bright$/$dark fringes.