The lowering of VP of $0.1\;m$ aqueous solution of $Nacl, Caso_4$ and $K_2So_4$

Question

$\begin{array}{1 1} \text{all equal} \\ \text{in the ratio of 1:1 :1:5} \\ \text{in the ratio of 1:2:3} \\ \text{in the ratio of 2:4:3 } \end{array}$