In the oxidation of oleic acid, the presence of the double bond at the ________ position

In the β oxidation of oleic acid, the presence of the double bond at the ________ position necessitates modification of the β oxidation cycle. The modification occurs after the ______ round of β oxidation because the ________ enoyl-CoA is not a substrate for _______. The problem is overcome by the action of the enzyme _____________ which converts the ________ bond to a __________ bond so that β oxidation can continue.