signal x(t) undergoes a zero-order hold operation with an effective sampling period T to...

signal x(t) undergoes a zero-order hold operation with an effective sampling period T to produce a signal Let denote the result of a .first-order hold operation on the samples of x(t); i.e.,

Where is the function shown in Figure P7.7. Specify the frequency response of a filter that produces as its output when is the output.