CREATE TABLE table_name_40 (k_2_o NUMBER, al_2_o_3 VARCHAR2, objects VARCHAR2, na_2_o VARCHAR2, fe_2_o_3 VARCHAR2)

What is the highest K 2 O, when Na 2 O is greater than 1.87, when Fe 2 O 3 is greater than 0.07, when Objects is Ritual Disk, and when Al 2 O 3 is less than 0.62?
SELECT MAX(k_2_o) FROM table_name_40 WHERE na_2_o > 1.87 AND fe_2_o_3 > 0.07 AND objects = "ritual disk" AND al_2_o_3 < 0.62
SELECT MAX("k_2_o") FROM "table_name_40" WHERE "al_2_o_3" < 0.62 AND "fe_2_o_3" > 0.07 AND "na_2_o" > 1.87 AND "objects" = "ritual disk"