$(4)$ WRITE TVE PSEUDOCODE FOR TXE ALGORITXM THAT TAKES A SET OF H$\text{'}$S AnD ComRolES THE SUM OF SQUARES OF THE H$\text{'}$S$.$

$(5)5$ HOW THAT $x^2+6x$ is O$(x^3)$ BUT $x^3$ is not $O(x^2+6x)$