i$)$ By using the appropriate table, determine the exponential Fourier Series of $\backslash ($ x$($t$)\backslash )$ Sketch the corresponding amplitude exponential Fourier Spectra if $\backslash ($ a$=1\backslash )$ until fourth harmonic, $\backslash ($ n$=4\backslash )$

$(5$ marks$)$

ii$)$ Give one observation, what would happen to Fourier spectra if $\backslash (\backslash$boldsymbol$\{$a$\}\backslash )$ is decreased by a factor of $2.$ Support your answer by sketching the output spectra.

$(5$ marks$)$