Which one of the following statements is wrong?

Water potential is the difference in the free energy or chemical potential per unit molal volume of water in a system and that of pure water at the same temperature and pressure. It is represented by greek letter $\mathrm{\Psi }$ (psi) or more accurately ${\mathrm{\Psi }}_{\mathrm{w}}$

Water potential or ${\mathrm{\Psi }}_{\mathrm{w}}$ is the sum total of ${\mathrm{\Psi }}_{\mathrm{s}}\mathrm{ }\mathrm{a}\mathrm{n}\mathrm{d}\mathrm{ }{\mathrm{\Psi }}_{\mathrm{p}}$.

${\mathrm{\Psi }}_{\mathrm{w }}= {\mathrm{\Psi }}_{\mathrm{s }}+ {\mathrm{\Psi }}_{\mathrm{p}}$

where ${\mathrm{\Psi }}_{\mathrm{s}}\to$ solute potential

${\mathrm{\Psi }}_{\mathrm{p}}\to$ pressure potential