Draw step five of this mechanism. Use H2SO4 as the acid source in this mechanistic step. Include all lone pairs and formal charges in the mechanism. Draw out explicitly only the ONE hydrogen removed from the H2SO4. Use an equilibrium arrow in this mechanistic step.
Draw step six of this mechanism. Include all lone pairs and formal charges in the mechanism. Use an equilibrium arrow in this mechanistic step.
Draw step seven of this mechanism, which forms resonance stabilized carbocation. Include all lone pairs and formal charges in the mechanism. Use an equilibrium arrow in this mechanistic step.
To show regiochemistry of the addition of the alkyl group, draw an arrow from the double bond of benzene to the carbocation.
Draw step eight of this mechanism, which forms the final product. Include all lone pairs and formal charges in the mechanism. Draw out explicitly only the ONE hydrogen that is removed in the elimination step. Use a regular reaction arrow for this mechanistic step. Use H2O as the base.