The following reaction takes place in a batch reactor:

$A+0\mathrm{.}4BC+0\mathrm{.}5D$

The rate law is $-r_A=k{C}_A{C}_B,$ where $k=0\mathrm{.}33Lmo{l}^{-1}mi{n}^{-1}.$ What is the order of the reaction with respect to B$?$ Express your answer to one decimal place. Note that if you enter a number to one decimal place and CANVAS automatically drops the decimal place $($i$.$e$."2\mathrm{.}0"$ becomes just $2),$ do not worry. Your answer will still be registered.