CREATE TABLE table_74005 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Name the first elected for jacob markell
SELECT "First elected" FROM table_74005 WHERE "Incumbent" = 'Jacob Markell'
SELECT "First elected" FROM "table_74005" WHERE "Incumbent" = 'Jacob Markell'