Question: What writer created this fictional superhero appearing in American comic books published by DC Comics and who was asked by the Justie League Task Force to select a "strike team"?

Context paragraphs:
Cyborg (comics): Cyborg (Victor "Vic" Stone) is a fictional superhero appearing in American comic books published by DC Comics.  The character was created by writer Marv Wolfman and artist George Pérez and first appears in a special insert in "DC Comics Presents" #26 (October 1980).  Originally known as a member of the Teen Titans, Cyborg was established as a founding member of the Justice League in DC's 2011 reboot of its comic book titles and subsequently in the 2016 relaunch of its continuity.

Superman: Superman is a fictional superhero appearing in American comic books published by DC Comics.  The character was created by writer Jerry Siegel and artist Joe Shuster, high school students living in Cleveland, Ohio, in 1933.  They sold Superman to Detective Comics, the future DC Comics, in 1938.  Superman debuted in "Action Comics" #1 (cover-dated June 1938) and subsequently appeared in various radio serials, newspaper strips, television programs, films, and video games.  With this success, Superman helped to create the superhero archetype and establish its primacy within the American comic book.  The character is also referred to by such epithets as the Big Blue Boy Scout, the Man of Steel, the Man of Tomorrow, and the Last Son of Krypton.

Doctor Occult: Doctor Richard Occult is a fictional superhero appearing in American comic books published by DC Comics.  Created by Superman's creators Jerry Siegel and Joe Shuster, Doctor Occult, also known as the Ghost Detective, is a private investigator and user of magic who specializes in cases involving the supernatural.  Doctor Occult is the earliest character created by DC Comics still currently used in the DC Universe.

Barbara Gordon: Barbara Gordon is a fictional superhero appearing in American comic books published by DC Comics, commonly in association with the superhero Batman.  The character was created by William Dozier, Julius Schwartz, and Carmine Infantino.  At the request of the producers of the 1960s "Batman" television series, DC editor Schwartz called for a new female counterpart to the superhero Batman that could be introduced into publication and the third season of the show simultaneously.  The character subsequently made her first comic book appearance as Batgirl in "Detective Comics" #359, titled "The Million Dollar Debut of Batgirl!"  (January 1967), by writer Gardner Fox and artist Carmine Infantino.

John Stewart (comics): John Stewart, one of the characters known as Green Lantern, is a fictional superhero appearing in American comic books published by DC Comics and was the first African-American superhero to appear in DC Comics.  The character was created by Dennis O'Neil and Neal Adams, and first appeared in "Green Lantern" #87 (December 1971).

Cassandra Cain: Cassandra Cain (also known as Cassandra Wayne) is a fictional superhero appearing in American comic books published by DC Comics, commonly in association with the superhero Batman.  Created by Kelley Puckett and Damion Scott, Cassandra Cain first appeared in "Batman" #567 (July 1999).  The character is one of several who have assumed the role of Batgirl, and Cassandra Cain goes by the name of Orphan in current DC Comics continuity.

Alan Scott: Alan Ladd Wellington Scott is a fictional superhero appearing in American comic books published by DC Comics, and the first superhero to bear the name Green Lantern.  He was created by Bill Finger and Martin Nodell first appearing in the comic book "All-American Comics #16", published in 1940.

Roy Harper (comics): Roy Harper is a fictional superhero appearing in American comic books published by DC Comics.  Roy is one of DC's most longstanding characters, originating in 1940s comics as Speedy, the teen sidekick of the superhero Green Arrow.  Like his mentor Green Arrow, Roy is a world-class archer and athlete who uses his exceptional marksmanship to fight crime.  Along with other prominent DC Comics superhero sidekicks, he goes on to become a core member of the superhero group the Teen Titans.  As an adult, Roy casts off his Speedy identity to establish himself as the superhero Arsenal, and for a time adopts the name Red Arrow to symbolise his having become an equal of Green Arrow.  As well as continuing to serve as one of the Titans at various times, Roy has had leading roles in the superhero groups the Seven Soldiers of Victory, the Outsiders, the Justice League, and the Outlaws.

Justice League Task Force (comics): Justice League Task Force was an American monthly comic book series published by DC Comics from June 1993 to August 1996; it lasted 37 issues.  At the time the Justice League was featured in three separate series: "Justice League America", "Justice League Europe" (JLE) and "Justice League Quarterly" (JLQ).  "Justice League Task Force" was a spinoff of "Justice League Europe", a series which ran from April 1989 to May 1993.  Like JLE, this team carried a United Nations charter which sanctioned their activities.  In fact, JLTF was composed of several former JLE members.  The team was called to action by Hannibal Martin, a representative of the U.N..  He asked that Martian Manhunter select a "strike team" of fellow Justice League members and to "lead them on a very special mission".

Martian Manhunter: The Martian Manhunter (J'onn J'onzz) is a fictional superhero appearing in American comic books published by DC Comics.  Created by writer Joseph Samachson and designed by artist Joe Certa, the character first appeared in the story "The Manhunter from Mars" in "Detective Comics" #225 (Nov. 1955).  Martian Manhunter is one of the seven original members of the Justice League of America.

Supporting paragraphs: Justice League Task Force (comics) Martian Manhunter
Answer: Joseph Samachson