Which of the following polymers is obtained by the condensation polymerisation method?

Identify the polymer obtained by using the monomer shown in the image:

Among $(I)-(IV)$,the compound that does not undergo polymerisation under radical initiation is:

When glycol is heated with dicarboxylic acid,the products are

Identify the monomer that can undergo polymerisation by free radical,cationic and anionic mechanisms.

The expected reactivity of the monomers shown below towards cationic polymerization follows the order:
$I: CH_2=CH-CO_2CH_3$
$II: CH_2=CH-Cl$
$III: CH_2=CH-CH_3$
$IV: CH_2=CH-Ph$