Consider the differential equation $x^{\text{'}}=(x+2\mathrm{.}5)(x+0\mathrm{.}5{)}^3(x-1\mathrm{.}5{)}^2(x-2\mathrm{.}5).$

List the constant $($or equilibrium$)$ solutions to this differential equation in increasing order and indicate whether or not these equilibria are stable, semi$-$stable $($semi$-$stable means unstable from one side, stable from the other$),$ or unstable.