Here is a graph of "well-being":
Consider three cycles of the human condition
y = A1 sin k1 x + A2 sin k2 x + A3 sin k3 x
where k1 = 2p / 15 k2 = 2p / 10 k3 = 2p / 7.5
and A1, A2, A3 are amplitudes of the corresponding cycles.
Change the values of the amplitudes and observe the change in the graph.
In particular, compare with the results of your take-home quiz 7.