Could you provide handwritten explination to solve the following.(I have seen the answer in computer but dont understand I prefer handwritten explination. 1. A small speaker is emitting sounds in all directions . How will the intensity of the sound that you detect change if you more 3 times FURTHER away from the speaker? (the teacher wrote down r+3r=48 then 16 , but i dont know how or were he got the numbers please explain step by step) 2. A small speaker is emitting sounds in all directions . How will the intensity of the sound that you detect change if you more 7 times FURTHER away from the speaker? 3. The amplitude of an ultrasound wave is decreased by 5 times . What is the change in the intensity of ther wave?