CREATE TABLE table_name_50 (number_of_s_eva NUMBER, lunar_lander VARCHAR2)

What is the average number of EVA for the Orion?
SELECT AVG(number_of_s_eva) FROM table_name_50 WHERE lunar_lander = "orion"
SELECT AVG("number_of_s_eva") FROM "table_name_50" WHERE "lunar_lander" = "orion"