(Solved): PLEASE HELP ANSWER ALL 3 QUESTIONS!! (VERY URGENT!!) Refer to the following reaction to answer quest ...

Refer to the following reaction to answer questions $28-30$. ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-\mathrm{H}+\mathrm{H}-\mathrm{Br}⟶???$ Question 28 Which option best describes the type of mechanism of this reaction? Electrophilic substitution Electrophilic addition Nucleophilic addition Nucleophilic substitution Identify the structure of the reaction intermediate formed during the course of this reaction. Identify the structure of the major organic product formed in this reaction.