I need help please

1. Distinguish between constructive and destructive interference. Please use 3 content related .q sentences. (ref: p.394-399) hi nooM affi no wonin's month 2. Explain how surface waves can have characteristics of both longitudinal waves and transverse waves. Please use 3 content related sentences. (ref: p.388-393) 3. A lifeguard on a beach observes that waves have a speed of 2.60 m/s and a distance of 2.50 m between wave crests. What is the period of the wave motion? Please show all work. (ref: p.382-387) 4. What will happen to the pitch of a sound as that sound's source approaches an observer? Explain why this happens, based on what you have learned about wave properties. Please use 3 content related mo sentences. (ref: p.382-387) betsin Jusino & J2691 16 921 926914 .esgaml isuflivesuboiq vino NED zionlim xevnoo vriw nisiqua .I 5. If a musical instrument such as a trumpet or flute is "flat", should the pipe be lengthened or asoneinez shortened? Explain with at least 2 content related sentences. (ref: p.418-427) beauborg Josido self to amist ni ensom eid forlw mistqxa .a.S- to noleaningsm s and tonim ASI 6. A train is moving at 23 m/s due east when it sounds a blast on its horn, frequency = 164 Hz. What frequency is heard by the driver of a car moving due east at 15 m/s along a road parallel to the tracks? Use 343 m/s for the speed of sound. Please show all work. (ref: p.410-417)