For each of the following pairs of polymers, state whether it is possible to decide whether one polymer has a higher tensile strength than the other. If this is possible, note which has the higher tensile strength and then cite the reason(s) for your choice; if it is not possible to decide, then state why. i) Syndiotactic polystyrene with a number-average molecular weight of 600,000 g/mol; atactic polystyrene with a number-average molecular weight of 500,000 g/mol ii) Random acrylonitrile-butadiene copolymer with 10% of possible sites crosslinked; block acrylonitrile-butadiene copolymer with 5% of possible sites crosslinked