points$)$ Write an expression for the real part of $x(t)=e^{(-2-j4)t}.$ Evaluate the real part of $x(t)$ at $=2\mathrm{.}125$ seconds.

points$)$ Let $x(t)=e^{(-0\mathrm{.}1-j)t}u(t-1).$

$(9$ points$)$ Let $x(t)=e^{(-0\mathrm{.}1-j)t}u(t-1).$

$($a$)(3$ points$)$ Sketch the real part of $x(t).$

$($b$)(3$ points$)$ Sketch the imaginary part of $x(t).$

$($c$)$ points$)$ Sketch the real part of $-x(-t-3).$