Given a production function $Q=4L^{{?}^{{?}^{?}}}(0\mathrm{.}3)K^{{?}^{{?}^{?}}}(0\mathrm{.}7),$ where $L$ is labor and $K$ is capital, what is the marginal rate of technical substitution $($MRTS$)$ when $L=25$ and $K=16?$ The definition of MRTS in this case is the following: MRTS is the rate at which labor can be substituted for capital while keeping output constant. Detail your answer. Do not even think of using chatGPT.