While on a cruise ship, you notice a dolphin launching itself above the water and diving back below repeatedly in a sinusoidal pattern. The dolphin reaches a maximum height of 4 meters above the water, and dives to a depth of 8 meters below the surface of the water. The dolphin leaps from the water every 5 seconds. When you first spotted the dolphin, it was at its maximum height of 4 meters. Let h = f(t) represent the height of the dolphin t seconds after you first spotted it. (a) Find the period, amplitude, and midline of h: Period: Amplitude: Midline: y = (b) Find the equation for h = f(t): h = || (c) Which of the following graphs represents h= = f(t)? W A www B + C D