Rewrite the sentences in the passive. 1. People can hear a strange noise in Taos. 2. Scientists haven`t found an explanation

1) A strange noise in Taos can be heard by people. 2) An explanation for the Hum haven\'t been found by scientists. 3) It is said that Yetis live in the mountains. 4) The Naga fireballs were seen by many people last night. 5) It is believed that the lights were UFOs.