Agroup of students decided to study the sinusoidal nature of tides. the depth of the water level was recorded at various times. at t = 2 hours low tide was recorded at a depth of 2 m. at t = 8 hours, high tide was recorded at a depth of 4 m. what was the depth of the water at time t = 5?

a. 4 m
b. 3.5 m
c. 2.5 m
d. 3 m