1- Express the signals shown in figure (1) in terms of unit step and unit ramp functions and Find the derivatives of each signal. h -1 0 1 2 3 3 2 x(1) x(t) -10 1 2 3 4 18 t Figure (1) 2. Sketch the following two functions x(t) and h(t): h(t) = 8(t+4)+8(t) + 8(-4) -1<t≤0 x(t)=1-t 0<t≤1 otherwise Compute and sketch the following: a) x(t) h(t) b) x(t) h(t/2) c) x(t) h(t-4) d) x(t) h(2t 4)