Question: Consider the following three continuous$-$time signals with a fundamental period of T$=1/3$ : x$($t$)=$cos$(6\backslash$pi t$),$y$($t$)=$sin$(6\backslash$pi t$),$z$($t$)=$x$($t$)$y$($t$)($a$)$ Determine the Fourier series coefficients of x$($t$).($b$)$ Determine the Fourier series coefficients of y$($t$).($c$)$ Use the results of parts $($a$)$ and $($b$),$ along with the multiplication property of the continuous$-$time Fourier