20-19-18-17-16/15-14-13-12-11-10-9 -8 -7 6 -5 4 -3-2 -3 The curve above is the graph of a sinusoidal function. It goes through the points (-8, 0) and (6, 0). Find a sinusoidal function that matches the given graph. If needed, you can enter 7=3.1416... as 'pi' in your answer, otherwise use at least 3 decimal digits. f(z) =