Assignment #$2$ EEE$3501$

Draw the graph of $(1$pt$)$

$x(t)=(2t+1)+(2t-1)$

Show if the following systems are dynamic or not $(4$pt$)$

a$.y(t)=sin(t)x(t)u(t)$

b$.y(t)=x(t)u(t-1)+e^{t}x(t-1)$