Solve the following non$-$homogeneous de using the method of Undetermed Coefficients: y$^(\text{'}\text{'})+5$y$^(\text{'})+6=3$e$^(2$x$).$ Solve the following non$-$homogeneous de using the method of Undetermed Coefficients: y$^(\text{'}\text{'})+5$y$^(\text{'})+6=4$cos$(2$x$).$ Solve the following non$-$homogeneous de using the method of Variation of Parameters: y$^(\text{'}\text{'})+5$y$^(\text{'})+6=3$e$^(2$x$).$ Solve the following non$-$homogeneous de using the method of Variation of Parameters: y$^(\text{'}\text{'})+5$y$^(\text{'})+6=4$cos$(2$x$).$