Aradio station will announce the winner of a contest when 3,200 callers have phoned the station. at 3: 00 p. m. 400 callers were counted. at 4: 00 p. m. 650 calls had been recorded. by 5: 00 p. m. 950 calls had come into the station, and by 6: 00 p. m. 1,300 calls had been counted. if the pattern continues, when will the radio station announce a winner?