Ferris wheel has a radius of 7 m. The centre of the wheel is 8 m above the ground. The Ferris wheel rotates at a constant speed of 15/s. The height above the ground of the only red seat can be modelled by the function (t) = 8 + 7 sin(15t). a) Determine the height of the red seat at the start of the ride. b) When is the red seat at its maximum height during the first rotation? c) When is the red seat at its minimum height during the first rotation? d) How long will it take for the red seat to complete two full rotations?