Question: What is the used (kb) when the graphics mode is 4?
SQL: SELECT MIN("used (KB)") FROM "1-18950885-3" WHERE "Graphics mode" = 4.0;

Question: If graphics mode is less than 1.0, what are the char cells?
SQL: SELECT "Char cells" FROM "1-18950885-3" WHERE "Graphics mode" < 1.0;