A four$-$layer oil reservoir is characterized by a set of reservoir capillary pressure$-$saturation curves as shown in Figure $1.$ The additional available data can be seen in the following table. Calculate and plot depth versus water saturation for this reservoir.

$\backslash$table$[[$Layer$,$Depth, $ft,$Permeability, md$],[1,4000-4010,80],[2,4010-4020,190],[3,4020-4035,70],[4,4035-4060,100]]$