I keep getting this question wrong please help

Part B Complete the mechanism and draw the intermediates and final products for the reaction of (S)-4,4-dimethylhexan-3-ol with phosphorus tribromide. Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the orld and connarting them with hande Inal... Br HE HIE I H 10 pr- sex Br: N Bl. O Br: S CI + 0 Br 1 P P HO F 11) A