please help with these questions

2. Which of the following compounds will form hydrogen bonding between its molecules? Explain your choices. (There can be more than one choice.) 3. Based on the representative part of the polymer chain, a) state whether it is an addition or a condensation polymer b) draw the full structural formula of the monomer 4. In the polymerization of but-2-ene, a) state whether it is an addition or condensation polymer b) draw the structural formulae for the monomer c) draw a representative part of the polymer chain