In this problem you will use undetermined coefficients to solve the nonhomogeneous equation y″−2y′+y=−+2− with initial values y(0)=−5andy′(0)=−6. a. write the characteristic equation for the associated homogeneous equation. (use r for your variable.) r^2 - 2r + r b. write the fundamental solutions for the associated homogeneous equation. y1= y2=