PAUL SIMON ART GARFUNKELSimon and Garfunkel Slated in LB. ArenaFresh from successful flings at movie composing and acting,' Simon and Garfunkel .will bring their ver-'sion of what’s happening today to th® Ixmg Beach Arena for a Saturday night concert.The two are back together after a year of doing oilier things. •'Paul Simon, the composer-lyricist of the- team, wrote' the theme for the hit picture ..The Graduate,”and has been busy writing songs for the next Simon-andGarfunkel album.Art Garfunkel dropped out of music for a while-to play an important role in Catch 22, the screen satire on the Air Force.. . ’ ‘ . ' '. Simon, neat and slim,-wilh his hair cut short and “mod,” sports a close-cropped beard and looks more like a young ad.man than a product of the acid era of rock. ~Garfunkel, taller and thinner, wears his hair like a halo and resembles a younger, tidier Albert Einstein.Scats for the concert are available at the Arena Box officee and Southland ticket outlets. Prices run from §3.50 to $6.50. ’• The performance will begin at 8:3D p.m.