CREATE TABLE table_33862 ("Frequency" FLOAT, "Callsign" CLOB, "Brand" CLOB, "City of License" CLOB, "Website" CLOB, "Webcast" CLOB)

Which Frequency has a Webcast of , and a Callsign of xemr?
SELECT AVG("Frequency") FROM table_33862 WHERE "Webcast" = '•' AND "Callsign" = 'xemr'
SELECT AVG("Frequency") FROM "table_33862" WHERE "Callsign" = 'xemr' AND "Webcast" = '•'