CREATE TABLE table_37040 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Class" TEXT, "FCC info" TEXT)

Name the least frequency Mhz with call sign of k202ag
SELECT MIN("Frequency MHz") FROM table_37040 WHERE "Call sign" = 'k202ag'
SELECT MIN("Frequency MHz") FROM "table_37040" WHERE "Call sign" = 'k202ag'