Please help

If it is easy and inexpensive for the buyers of a rm's product to resell the product to each other, then it will be 0 easy for the rm to do 3rd degree price discrimination, but hard to do 2nd degree price discrimination. 0 hard for the rm to do any type of price discrimination. 0 easy for rm to do 2nd degree price discrimination, but hard to do 3rd degree price discrimination. 0 easy for rm to do lst degree price discrimination, but hard to do 2nd or 3rd degree price discrimination