If 100 waves pass through a point of a medium in 20 seconds, what is the frequency and time period of the wave? If its wavelength is 6cm, calculate the wave speed

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane