Please answer the following questions down below

Propose a synthetic pathway of the product below starting from acetylene and 1-bromo-3methylbutane What is the products of this acid catalyzed reaction. Discuss the stereochemical relationship of the products. Consider the following results when one enantiomer of (1-chloroethyl)benzene undergoes reactions under two different sets of conditions, labeled 'Case 1' and 'Case 2. Assign the R or S configuration at chiral atoms in the compound. Case 1 CH3OH (excess) one enantiomer oxygen-containing product(s) non-oxygen-containing having optical rotation [] of 0+product(s) Case 2 one enantiomer oxygen-containing product(s) non-oxygen-containing product(s) having much higher optical rotation []+