Show how you would synthesize the following compounds, starting with acetylene and any compounds containing no more

Question:

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, CH3---CO----CH2CH2CH3
(i) (±)-3,4-dibromohexane
(j) meso-butan-2,3-diol
(k) 2-methylhex-3-yn-2ol