American cartoonist. 29 William J. Bell, 78, American screenwriter and television producer (The Young and the Restless, The Bold and the Beautiful), Alzheimer's disease. Dianne Brooks, 66, American jazz singer. Mel Gussow, 71, American theatre critic for The New York Times, cancer. Sara Henderson, 69, Australian author. Leonid Khachiyan, 52, Russian/American mathematician and computer scientist. Mariana Levy, 39, Mexican actress, heart attack following a robbery attempt. Johnnie Stewart, 87, British television producer (Top of the Pops). 30 Sylve Bengtsson, 74, Swedish football player. Wim Esajas, 70, Suriname middle-distance runner. Lourens Muller, 87, South African politician. Phil Rasmussen, 86, American Army Air Corps officer, complications from cancer. Ron Todd, 78, English former general secretary of the Transport and General Workers Union References 2005-04 04