onse. (1 mark each) Use the following information to answer the next three questions: The height of a tidal wave approaching the face of the cliff on an island is represented by the = 7.5 cost where h(t) is the height, in metres, of the wave above normal sea equation h(t) level t minutes after the wave strikes the cliff. 1. What is the maximum height of the wave relative to normal sea level? 2. What is the period of the function? How high, to the nearest tenth of a metre, will the wave be, relative to normal sea level, one minute after striking the cliff?