What is the rate constant for a reaction of $(CH_3)_3CBr$ with water is represented below :$CH_3)_3CBr+H_2O\rightarrow (CH_3)_3COH+HBr$ where the following data was obtained experimentally:

Question

$\begin{array} {cccc} \text{Experiment} & [A]\; mol\;L^{-1} & [B]\; mol\;L^{-1} & \text{Initial Rate} \; mol\;L^{-1}min^{-1}\\ 1 & 5 \times 10^{-2} & 2 \times 10^{-2} & 2 \times 10^{-6}\\ 2 & 5 \times 10^{-2} & 4 \times 10^{-2} & 2 \times 10^{-6}\\ 3 & 1 \times 10^{-1} & 4 \times 10^{-2} & 4 \times 10^{-6}\\ \end{array}$

$\begin{array}{1 1} 2\times 10^{-5} \\ 8\times 10^{-5} \\ 4\times 10^{-5} \\3\times 10^{-5} \end{array}$