Question: Mark King and Ralph Tresvant are both musicians and played what role in their bands?

Context paragraphs:
Rizz-Wa-Faire: Rizz-Wa-Faire is the third solo album by Ralph Tresvant of New Edition.  It was originally released on March 7, 2006.  The first and only single from the album is "My Homegirl".

Orchard Park Projects: Orchard Park, also known as "Home of New Edition," was one of Boston's most notorious housing projects, located in Roxbury, Massachusetts.  It is also the former home of singer Bobby Brown and New Edition members Ricky Bell, Michael Bivins and Ralph Tresvant.  The 350-unit three-story brick complex was built in 1941 and was demolished in 1998 due to crime problems.

Mark King (musician): Mark King (born 20 October 1958) is an English musician.  He is most famous for being the lead singer and bassist of the band Level 42.  King is known for his slap style of playing the bass guitar, with MusicRadar describing him as "the guy who put the slap in pop during the 80s".  He won the "Outer Limits" award at the 2017 Progressive Music Awards.

Ralph Tresvant: Ralph Edward Tresvant Sr. (born May 16, 1968), also known as Rizz and Rizzo, is an American contemporary R&B singer best known as the lead singer of R&B/pop group New Edition.  As a solo artist, Tresvant released the album "Ralph Tresvant" (1990).  In 2008, he began touring with Bobby Brown and Johnny Gill in a new group named Heads of State.

Ralph Tresvant (album): Ralph Tresvant is the self-titled debut album of Ralph Tresvant.  The album was released in 1990 by MCA Records and has been certified Platinum by the Recording Industry Association of America.  It went to number one on the Top R&B Albums chart for two weeks and peaked into the Top 20 on the "Billboard" 200 chart.  It features the #1 single, "Sensitivity" along with two more Top 5 R&B hits: "Do What I Gotta Do" and "Stone Cold Gentleman", which featured labelmate Bobby Brown.

Two Hearts Collide: "Two Hearts Collide" is a pop/romantic song released in 1988, in the studio album "Staring at the Sun", by the British musical group Level 42.  It was written by Mark King and Boon Gould, that had already abandoned the band.  It was not well received by critics in the beginning, as almost all of the music of the album "Staring at the Sun", in spite of this, was well received by the fans of the band.  This song is in the compilation released in 1998 "Turn It On".  The lead vocals are by Mark King.

New Edition: New Edition is an American R&B group from the Roxbury neighborhood of Boston, Massachusetts formed in 1978.  The group reached its height of popularity in the 1980s.  During the group's first experience with fame in 1983, its members were Ricky Bell, Michael Bivins, Bobby Brown, Ronnie DeVoe and Ralph Tresvant.  Early hits included "Candy Girl," "Cool It Now", and "Mr. Telephone Man".  Brown was voted out of the group in 1985 and embarked on a solo career.  The group continued for a time with its remaining four members, but eventually recruited singer Johnny Gill, who would be introduced on their 1988 album "Heart Break".  The group went on hiatus in 1990, while its various members worked on side projects, such as the group Bell Biv DeVoe.  Gill and Tresvant also recorded successful solo albums.

Monica Calhoun: Monica Calhoun is an American film and television actress.  Calhoun is best known for her roles in the films "Bagdad Cafe", "The Players Club", "The Salon", "The Best Man", and its sequel "The Best Man Holiday" as well as two biopic miniseries such as Rebbie Jackson on "" and Patricia Tresvant, mother of Ralph Tresvant on "The New Edition Story".  Calhoun was Nominated for an Emmy Award for her performance in the CBS Schoolbreak Special "Different Worlds: A Story of Interracial Love" (1993).  She was nominated for NAACP Image Award for Outstanding Actress in a Motion Picture for her portrayal of Mia Morgan in the 1999 comedy-drama film "The Best Man".2017 BET New Eddition Story portrayl of Ms Tresvant, Ralph's Mother.

Old Thing Back: "Old Thing Back" is a 2015 single by Norwegian DJ Matoma that is a club remix of the 2007 song "Want That Old Thing Back" by The Notorious B.I.G. featuring Ja Rule and Ralph Tresvant.  "Want That Old Thing Back" appeared on the compilation album "Greatest Hits", and is a remix of the 1995 Notorious B.I.G. single "One More Chance".  "Old Thing Back" is credited to "Matoma and The Notorious B.I.G. featuring Ja Rule & Ralph Tresvant".

Word to the Mutha!: "Word to the Mutha!"  is a song co-written and performed by American contemporary R&B group Bell Biv DeVoe.  It originally appeared on their debut studio album "Poison" under the title "Ronnie, Bobby, Ricky, Mike, Ralph and Johnny (Word to the Mutha)!" , but the title was shortened and a remixed version of the song was issued as the only official single from the group's remix album "" The song features vocals from Bobby Brown, Ralph Tresvant and Johnny Gill; and it was the first recorded song to feature all six members of New Edition; although Brown, Tresvant and Gill are credited separately on the single rather than collectively as New Edition.

Supporting paragraphs: Mark King (musician) Ralph Tresvant
Answer: lead singer