A sound wave is modeled by

Where pn(t) = 1 / n sin (524n π t), t represent the time (in seconds).
(a) Find the sine components pn(t) and use a graphing utility to graph the components. Then verify the graph of p shown below.

b) Find the period of each sine component of p. Is p periodic? If so, then what is its period?
(c) Use the graphing utility to find the t-intercepts of the graph of p over one cycle.
(d) Use the graphing utility to approximate the absolute maximum and absolute minimum values of p over one cycle.

[P;(t) + 30p2(t) + P3(1) + P3(t) + 30p,(t)] p(t) 4 %D y | 1.4 0.006