Water contains cations and anions at the following concentrations: [Mg2+] = 2.0 meq/l; [Ca2+] = 1.5 meq/l; [Na+] = 0.8 mEq/l; [Cl-] = 2.3 meq/l; [HCO3-] = 1.9 mEq/l; [SO4^2-] = 0.1 mEq/l. Calculate the total, temporary, and constant water hardness values