Chapter 3.3, Problem 37P

Find a function y (x ) such that $y^{\left(4\right)}\left(x\right)=y^{\left(3\right)}\left(x\right)$ for all x and $y\left(0\right)=18,y\text{'}\left(0\right)=12,y"\left(0\right)=13,\text{and}{y}^{\left(3\right)}\left(0\right)=7$ .