List the following monomers in order of their increasing tendency toward alternation with 1,3-butadiene in radical copolymerization (use Q/e scheme to calculate r values):
a. n-Butyl vinyl ether
b. Methyl methacrylate
c. Methyl acrylate
d. Styrene
e. Maleic anhydride
f. Vinyl acetate
g. Acrylonitrile
Explain the relative alternating tendencies in these copolymerization