QUESTION 4 Not yet answered the value of the Laplace transform $\mathscr{\{ e^{ (a + i b ) t } U}}$ where $i=\sqrt{-1}$ is: Marked out of $2.00$ Select one. P Flag question a. $\frac{(s-a)-b}{(s-a)^{2}+b^{2}}$ b $\frac{(s-a)+b}{(s-a)^{2}- b^{2}}$ c. $\frac{(s-a)+i b}{}+h^{2}$ CS.VS. 1407||