I need help with those problems. Please!!!

Sound and Waves Review 1. A wave in the ocean has a period of 5 seconds. The distance between wave crests is 18 rn. What is the wave's velodty? A hummingbird, producing a sound with a frequucy of 12,500 Hz, is diving down at you. You hear a sormd of 12,850 Hz. How fast is the hummingbird flying? You count 13 waves passing you in 60 seconds. if the distance between the wave crests is 15 m, what is the waves' velocity? A certain sound has an intensity of 1.35 x 10" Win12. What is its intensity level (loudness)? A wave has a velocity of 1285 mis. If its period is 1.28 seconds, what is the wave's frequency? How much power would a loudspeaker have if the intensity level was 85 dB, measured 25 in from the loudspeaker? As a re truck approaches you at an unknown speed, you hear a frequency of 12,430 Hz from its siren. If the siren's acme] frequency is 12,350 Hz. what is the truck's speed? At a distance of 6 m from a sound source, you hear an intensity level of 72 dB. A) What is the intensity at Bun? B) What is the power of the sound source? C) What is the intensity and intensity level 38 m from the sound source