Show how you would synthesize the following compounds, starting with acetylene and any c...

Show how you would synthesize the following compounds, starting with acetylene and any compounds containing no more than four carbon atoms.

(a) hex-1-yne

(b) hex-2-yne

(c) cis-hex-2-ene

(d) trans-hex-2-ene

(e) 1,1-dibromohexane

(f) 2,2-dibromohexane

(g) pentanal, CH₃CH₂CH₂CH₂CHO

(h) pentan-2-one,

(i)

(j) meso-butan-2,3-diol

(k) 2-methylhex-3-yn-2-ol