What 2014 mixtape is by an individual who wrote for an artist signed to Warner Bros.?
Wiz Khalifa Cameron Jibril Thomaz (born September 8, 1987), better known by his stage name Wiz Khalifa, is an American rapper and actor. He released his debut album, "Show and Prove", in 2006, and signed to Warner Bros. Records in 2007. His Eurodance-influenced single, "Say Yeah", received urban radio airplay, charting on the Rhythmic Top 40 and Hot Rap Tracks charts in 2008.
Lil Yachty Miles Parks McCollum (born August 23, 1996), better known by his stage name Lil Yachty, is an American rapper and singer. Yachty first gained recognition in August 2015 for his singles "One Night" and "Minnesota" from his debut EP "Summer Songs". He released his debut mixtape "Lil Boat" in March 2016. On June 10, 2016, Yachty announced that he had signed a joint venture record deal with Quality Control Music, Capitol Records, and Motown Records. His mixtapes "Lil Boat" and "Summer Songs 2" were released in 2016 and his debut studio album "Teenage Emotions" in 2017.