7. (Pb 1.13) Use the sampling property of the unit impulse function to evaluate the following integrals. (a) cos 616(1-3)dt (b) † 108(1)(1+1)`'dt (c) 8(t+4)(t² +61 +1)dt (d) exp(-1²)6(1-2)dt 8. If waveform x(t) has the F.T. X(f) shown below: x(f)= j2IIf 1+j2IIf Find the F.T. Y(f) of the following waveforms y(t) which are related to x(t) as follows: a. y(t) = x(2t+2) b. y(t) ex(t-1) c. y(t)=2*(dx(t)/dt) d. y(t)=x (1-t) Hint: simply use the F.T. table to evaluate each new F.T.