1. 25 pts A chloroprene rubber has a fluorine atom in place of the-CH3 side radical of isoprene (see below). a) (8 pts) What is the weight fraction of sulfur present when 10% of the crosslinks are occupied? b) (7 pts) What fraction of the cross links are occupied when 5 w/o oxygen is used instead of sulfur? c) (10 pts) What is the effect of a larger percentage of crosslinks occupied (by sulfur or oxygen) on the rubber