CREATE TABLE table_name_81 (crew_chief VARCHAR, primary_sponsor_s_ VARCHAR, car_s_ VARCHAR, team VARCHAR)

Who is the crew chief of team Joe Gibbs Racing, which has a Chevrolet Monte Carlo and Fedex as the primary sponsor?
SELECT crew_chief FROM table_name_81 WHERE car_s_ = "chevrolet monte carlo" AND team = "joe gibbs racing" AND primary_sponsor_s_ = "fedex"
SELECT "crew_chief" FROM "table_name_81" WHERE "car_s_" = "chevrolet monte carlo" AND "fedex" = "primary_sponsor_s_" AND "joe gibbs racing" = "team"