By name or number, identify all of the following 3 statements which are true about the Diels-Alder reaction: 1) The more nucleophilic end of the diene will interact with the most electrophilic end of the dienophile 2) The endo product is the more thermodynamically favorable product 3) If there are no stereogenic centers on the diene, the reaction will always produce a pair of enantiomers as the major product