3. A survey of 600 Jua kali workers showed that 310 listened to the seven o'clock news on radio and that 370 regularly listened to late night news on radio while 120 regularly listened to both newscasts. Find the number of workers who listened to : i. The seven o'clock news but not the late night news ii. The late night news but not the seven o'clock news iii. Exactly one of the news broadcasts iv. At least one of the news broadcasts v. The number of workers who did not listen to either of the news broadcasts