Answer:
Amplitude = 3 feet
Period = 16 hours
Midline y = 5
Explanation:
The saginaw bay tides vary between 2 feet and 8 feet that means amplitude of the wave function will be

Now midline of the function will be

As it has been given in the question that tide completes a full cycle in 16 hours that means period of the function formed will be 16 hours.