(5) (a) CH3CH2CH2CCCH2CH2CH3 (b) (6) Propose a two-step synthetic sequence to prepare 1-pentyne from acetylene and any other chemical reagent. Be sure your answer includes the specific chemical reactions you would carry out. (7) What is the initiation step in the free-radical chlorination of methane to produce chloromethane? (8) An anion radical is an intermediate in the dissolving metal reduction of an alkyne to a trans alkene. Which of the structures shown below is an anion radical? (There is only one answer.) (9) Draw the structures of all monochlorination products which result from the free-radical chlorination of the alkane shown below