CREATE TABLE table_59642 ("Team" TEXT, "Driver" TEXT, "Class" TEXT, "Chassis" TEXT, "Engine" TEXT, "Rounds" TEXT)

What c class engine did philipp eng and team hs technik motorsport use?
SELECT "Engine" FROM table_59642 WHERE "Class" = 'c' AND "Team" = 'hs technik motorsport' AND "Driver" = 'philipp eng'
SELECT "Engine" FROM "table_59642" WHERE "Class" = 'c' AND "Driver" = 'philipp eng' AND "Team" = 'hs technik motorsport'