What is the correct increasing order of reactivity of the following compounds towards electrophilic aromatic substitution reaction?

Electron donating groups increase the reactivity of benzene ring towards electrophilic aromatic substitution while electron withdrawing groups decrease the reactivity.

-CH₃ is an electron donating and an ortho para directing group while -F and -CHO are electron withdrawing groups.

Compound I contain -CH₃ groups at 1 and 3 positions allowing the incoming electrophile to attack in ortho positions.

Compound II contains -CH₃ groups at 1 and 4 positions. Thus, the incoming electrophile is not available to bind with benzene at ortho and para positions as two methyl groups repel each other in their ortho para directing effect.

-F is highly electronegative compared to carbonyl group, leading to its more electron withdrawing nature.

Thus, the increasing order of reactivity of the following compounds towards electrophilic aromatic substitution reaction is: IV < III < II <I