The correct acidity order of the following is

Electron withdrawing groups increase the acidity of carboxylic acids by stabilising the
conjugate base through delocalisation of the negative charge by inductive and/or resonance effects. Conversely, electron donating groups decrease the acidity by destabilising the conjugate base.

The effect of the following groups in increasing acidity order is
Ph < I < Br < Cl < F < CN < NO₂ < CF₃