1- A first-order hold is a sampling system in which the output xFOM(t) (solid curve) is equal to the input x(t) (dotted curve) at every t=nT (where n is an integer) and a linear interpolation between the points at all other times. A) Express xFOM(t) in terms of: = otherwise0 1||when||1 )(tri tt t B) Find XFOM(j). C) What is the practical problem in implementing this system? D) Repeat part B if the time domain output is shifted to the right by T. E) Determine the proper reconstruction filter to retrieve x(t) from xFOM(t) as defined in part D