Table: fm_stations_4
Columns: call_sign
frequency_mhz
city_of_license
erp_w
class
fcc_info

Question: Name the total number of frequency Mhz with class of d and call sign of k201bm and ERP W less than 74
SQL: SELECT COUNT("frequency_mhz") FROM fm_stations_4 WHERE "class" = 'd' AND "call_sign" = 'k201bm' AND "erp_w" < 74

Question: Name the least frequency Mhz with call sign of k202ag
SQL: SELECT MIN("frequency_mhz") FROM fm_stations_4 WHERE "call_sign" = 'k202ag'

Question: Name the class with call sign of k220cp
SQL: SELECT "class" FROM fm_stations_4 WHERE "call_sign" = 'k220cp'