Let $x(t)$ is a low$-$pass bandlimited signal with maximum frequency $10$ Hz $.$ Assume that the spectrum of $x(t)$ is in triangular shape. The signal $x(t)$ is naturally sampled with a periodic train of rectangular pulses of duration $50/3$ milliseconds. Plot the spectrum of the sampled signal for frequencies up to $50$ Hz if the sampling rate is equal to $($i$)$ the Nyquist rate and $($ii$)10$ samples per second.