Maple Worksheet to show solutions to Exercises 23 and 24 in Math 244, Chapter 3.3:First, define the differential equation. Note how we define the second derivative:DE23:=3*diff(u(t),t$2)-diff(u(t),t)+2*u(t)=0;Next, we solve the DE using the "dsolve" command. Two things to note here: How we define the initial conditions (in particular, the initial velocity is defined using the D notation). Getting the "right hand side" of the equation, we put the solution into the variable U.U:=rhs( dsolve( { DE23, u(0)=2, D(u)(0)=0 },u(t)) );Plot the function. In particular, get an estimate for the solution (in this case, |u(t)|=10 somewhere between times 10 and 12).plot(U,t=0..15);Now find the numerical solution using the "fsolve" command:fsolve(U=-10,t=10..12);Now we'll solve Exercise 24 in much the same way:DE24:=5*diff(u(t),t$2)+2*diff(u(t),t)+7*u(t)=0;U:=rhs( dsolve( { DE24, u(0)=2, D(u)(0)=1 },u(t)) );plot({U,0.01,-0.01},t=0..35,y=-0.2..0.2);plot({U,0.01,-0.01},t=20..30);fsolve(U=-0.01,t=25..27);