The total period of the function shown in the figure is 4 sec and the amplitude is 10. Find the function f1 (t) from t = 0 to 1 in terms of unit step function.

The total period of the function shown in the figure is 4 sec and the

1.	The total period of the function shown in the figure is 4 sec and the amplitude is 10. Find the function f1 (t) from t = 0 to 1 in terms of unit step function.
A.	10t [u (t) – u (t + 1)]
B.	10t [u (t) + u (t – 1)]
C.	10t [u (t) + u (t + 1)]
D.	10t [u (t) – u (t – 1)]
Answer» E.