The increasing order of the reactivity of the following

$\mathrm{CH}_{3}$ group when bonded to benzene increases the electron density of benzene ring due to $+I$ and hyper conjugation effects. $-\mathrm{Cl}$ group decreases the electron density of benzene ring due to $-\mathrm{I}$ effect, and $-\mathrm{COCH}_{3}$ group strongly decreases the electron density of benzene ring due to $-I$ and $-R$ effects. Therefore, correct increasing order of the given compounds. towards electrophilic aromatic substitution is