Show, by writing an appropriate series of equations, how you could prepare propyne from each of the

Question:

Show, by writing an appropriate series of equations, how you could prepare propyne from each of the following compounds as starting materials. You may use any necessary organic or inorganic reagents.
(a) 1-Propanol
(b) Isopropyl bromide
(c) 1,1-Dichloroethane
(d) Ethyl alcohol