Question: Yes? No? is the debut extended play by  South Korean singer and member of what girl group?

Context articles: Bae Suzy
Yes? No?
Better Together (EP)
Fifth Harmony discography
Twice discography
Thunder (singer)
Don't Say No (Seohyun EP)
Luna discography
Write.. (EP)
Venus (Hello Venus EP)

Bae Su-ji (; born October 10, 1994), better known by the mononym Suzy, is a South Korean singer and actress.
 She is a member of the girl group miss A under JYP Entertainment .
Yes?
 No?
 is the debut extended play by South Korean singer Suzy.
 It was released by JYP Entertainment on January 24, 2017.
 The extended play features six original tracks.
Better Together is the debut extended play by American girl group Fifth Harmony.
 It was their first release after placing third on the second season of American televised reality show "The X Factor", and was released on October 18, 2013 through Epic Records.
 Lyrically, the extended play discusses themes of love, heartbreak and empowerment.
 Throughout the recording process, the group worked with a variety of music producers including Savan Kotecha and Harmony Samuels as well as Julian Bunetta who served as the executive producer of the extended play.
 "Better Together" is primarily a pop record with elements of funk, pop rock, power pop, dance, bubblegum pop, acoustic guitar, R&B and minimalist urban influences.
The discography of American girl group Fifth Harmony consists of three studio albums, six extended plays, ten singles and thirteen music videos.
 After finishing third on the second season of the American televised singing competition "The X Factor" the group was signed to Epic Records though Syco Music.
 Less than a year later, Fifth Harmony released their debut single from their debut extended play, "Miss Movin' On".
 The single charted on the Mainstream Top 40 and New Zealand, peaking at 27 in both countries.
 It was certified gold in the United States for selling combined sales and track-equivalent streams units of 500,000.
 The group's extended play, "Better Together" peaked at number six on the "Billboard" 200 and number 18 in New Zealand, charting in both countries similar to the group's lead single.
 As part of the promotion for "Better Together", four other versions were released of the extended play, including an acoustic release, a Spanish-language acoustic and a standard Spanish-language translated version as well as a remix edition.
South Korea-based girl group Twice have released four extended plays (one of which was reissued under a different title), one compilation album, one compilation EP, and five singles.
 Formed by JYP Entertainment in 2015 through the survival show "Sixteen", Twice debuted in October 2015 with the release of their first EP, "The Story Begins", and its single "Like Ooh-Ahh".
 The EP and the single peaked at No. 3 and No. 10 on the Gaon Music Chart, respectively.
 "The Story Begins" eventually sold over 120,000 copies, becoming the best-selling debut extended play by a K-pop girl group of all time, breaking the record set by Girls' Generation's first extended play "Gee" (2009), which sold nearly 100,000 copies.
Park Sang-hyun (Korean: 박상현 ; born October 7, 1990) better known by his stage name Thunder (Hangul: 천둥 ; RR: "Cheondung " ), is a South Korean singer, songwriter, actor and model.
 He is a former member of South Korean boy band MBLAQ.
 On December 16, 2014, it was announced that he had departed from the group to focus on studying music.
 He signed with Mystic Entertainment's music label APOP on February 11, 2015 and released his debut extended play on December 7, 2016.
Don't Say No is the debut extended play by South Korean singer Seohyun.
 It was released by S.M. Entertainment on January 17, 2017.
 The EP marked the official solo debut of Seohyun, who had been known as a member of South Korean girl group Girls' Generation for ten years.
Luna (born Park Sun-young) is a South Korean singer, best known as a member of girl group f(x).
 Since 2009, she has released one extended play, twelve singles (including six collaborations and four as a featured artist), and fourteen soundtrack appearances.
 Her career as a solo artist began in May, 2016, with the release of her debut extended play, "Free Somebody".
Write.
.
 is the debut extended play by South Korean singer Woohyun.
 It was released by Woollim Entertainment on May 9, 2016.
 The EP marked the official solo debut of Woohyun, who had been known as a member of South Korean boy group Infinite for nearly six years.
Venus is the debut extended play by South Korean girl group Hello Venus.
 It was released on May 9, 2012, by Tricell Media and distribuited by NHN Bugs.
 "Venus" was released as the title track from the EP, and the group performed the song on South Korean music programs, including "Music Bank" and "Inkigayo".
 A music video for the title track was also released on May 9.