Polymer molecular weight details

of an industrial chemical that is a polymer, means the following: 

• the number average molecular weight of the industrial chemical
• the weight average molecular weight of the industrial chemical
• the polydispersity index for the industrial chemical
• the percentage (by mass) of molecules with a molecular weight that is less than 1,000 g/mol
• the percentage (by mass) of molecules with a molecular weight that is less than 500 g/mol.