Consider an analog periodic function, $x(t),$ consisting of square wave of period $5$ seconds. $(To=5$ seconds, $=1$ second$)$

a$)$ Sketch $x(t)$

b$)$ Find an expression for the Fourier coefficients for $x(t)$

Final answer for part b: $q,$

c$)$ If To were to be doubled while holding $$ fixed, what would happen to the spacing between the harmonics?