Problem 1.25 of [Ulaby and Yagle, 2018]: Plot the following functions (over an appropriatetime span and time scale): \text { 1) } x_{1}(t)=100 e^{-2 t} \mathbb{1}(t) \text { 2) } x_{2}(t)=-10 e^{-0.1 t_{\mathbb{1}}(t)} \text { 3) } x_{3}(t)=-10 e^{-0.1 \mathbb{}_{1}(t-5)} \text { 4) } x_{4}(t)=10\left(1-e^{-10^{3} t}\right) \mathbb{1}(t) \text {. } \text { 5) } x_{5}(t)=5 \operatorname{rect}((t-2) / 2)-5 \operatorname{rect}((t-3) / 2) \text {. }