He solution to the initial value problem x′′+2x′+26x=5cos(4t),x(0)=0,x′(0)=0 x″+2x′+26x=5cos⁡(4t),x(0)=0,x′(0)=0 is the sum of the steady periodic solution xspxsp and the transient solution xtrxtr. find both xspxsp and xtrxtr.