Short answers, pulled from the story.
Richard Marquand directed Return of the Jedi, after Steven Spielberg, David Lynch, David Cronenberg, and Lamont Johnson were all considered and did not take the job. Lucas himself financed the film but chose not to direct it.
Return of the Jedi opened in American theaters on the 25th of May 1983. The date was chosen deliberately, six years after the original Star Wars had premiered in 1977.
The film carried the working title Revenge of the Jedi after Lawrence Kasdan told Lucas that Return of the Jedi was a weak name. In December 1982, Lucas restored the original title, deciding a Jedi should never seek revenge, though thousands of Revenge of the Jedi teaser posters had already been printed.
Return of the Jedi grossed $314.3 million in the US and Canada and $166 million in other territories, for a worldwide total of $480 million against a production budget of about $32.5 million. It earned $6.2 million on its opening day alone, a record at the time.
Return of the Jedi was filmed at Elstree Studios in England, in Arizona's Yuma Desert, at Grizzly Creek Redwoods State Park near Smith River in Northern California, and at Skywalker Ranch. Special effects work was completed at Industrial Light and Magic in San Rafael, California.
According to producer Gary Kurtz, Han Solo died through self-sacrifice in an early draft of the script, an idea Harrison Ford and Lawrence Kasdan both favored. Kurtz has suggested Lucas rejected that ending partly out of concern for merchandising, and the finished film let Han live.