Draw the structures of the following $($monomer structures given below$)$:

a$.$ Isotactic, syndiotactic, and atactic polystyrene

b$.$ Cis$-$ and trans$-$polybutadiene

c$.$ Statistical and alternating copolymers of vinyl chloride and ethyl a

a$.$ Isotactic, syndiotactic, and atactic polystyrene

b$.$ Cis$-$ and trans$-$polybutadiene

c$.$ Statistical and alternating copolymers of vinyl chloride and ethyl acrylate

d$.$ Syndiotactic poly$($propylene$)$

e$.$ Block copolymer of poly$($propylene$)$ and poly$($ethylene$)$

f$.$ A semi$-$interpenetrating network

g$.$ Graft copolymer

h$.$ Cross$-$linked polyethylene