CREATE TABLE table_58379 ("Entrant" TEXT, "Constructor" TEXT, "Chassis" TEXT, "Engine" TEXT, "Tyres" TEXT, "Driver" TEXT, "Rounds" TEXT)

What was the engine driven by Jean-Pierre Jarier and has a chassis of PC4?
SELECT "Engine" FROM table_58379 WHERE "Driver" = 'jean-pierre jarier' AND "Chassis" = 'pc4'
SELECT "Engine" FROM "table_58379" WHERE "Chassis" = 'pc4' AND "Driver" = 'jean-pierre jarier'