$s(t)=A\frac{4}{}{\displaystyle \underset{k\text{o}\text{d}\text{d}}{\overset{}{}}},k=1\frac{sin(2kft)}{k}$

a$)$ the spectrum of $Y$

b$)$ the bandwidth of $Y$

c$)$ the data rate of $Y$

d$)$ the wavelength of the fundamental frequency component of Y$.$ Assume the wave travels at the

speed of light, ${300}^{\text{'}}000K\frac{M}{s}$