The trick to living a longer, happier life. This episode was produced by Miles Bryan, edited by Jenny Lawton, fact-checked by Michelle Hirsch, engineered by Patrick Boyd, and hosted by Jonquilyn Hill. Iris Apfel celebrating her 100th birthday party in New York City. Photo by Patrick McMullan/Patrick McMullan via Getty Images for Central Park Tower. If you have a question, give us a call at…