i need help with these three please

Show how to carry out the synthesis using an aromatic halogenation reaction at one point in the synthesis. 3. Draw the mechanism for the desulfonation reaction shown below. The sutfo group is removed. +H2O dilute H2SO4 H2SO4 3 1D: A 4. The mechanism of the Friedel-Crafts reaction is as follows, however, the curved arrows have been omitled. Supply the missing curved arrows. 3. Draw the mechanism for the desulfonation reaction shown below. Desulfonation The sulfo group is removed. +H2SO4 4. The mechanism of the Friedel-Crafts reaction is as follows, however, the curved arrows have been omitted. Supply the missing curved arrows